A/n: Okay so in case anyone is wondering, Shawn is hugging Camila Cabello in the picture after her Never Be The Same concert in Toronto. Obviously everyone is older in this imagine. Also, explicit language in this imagine! Okay, let's begin!

My husband of one year, Shawn Mendes and I woke up to the sound of our doorbell going off repeatedly.

"Who the fuck is that?" Shawn asked, upset that he had been woken up from his slumber.

"I don't know." I said with a shrug. Shawn and I got up and went downstairs. We opened up the door, and there was my sister-in-law, Shawn's sister, Aaliyah. She had tears streaming down her cheeks.

"Aaliyah? What's wrong?" Shawn asked, panic etched across his face.

"Y/n is it okay if I talk with you, alone?" Aaliyah asked. I nodded.

"Of course. Let's go in the guest bedroom." I said. Shawn looked worried. I rubbed his shoulder and gave him a smile. Aaliyah and I went upstairs and into the guest bedroom. We sat down on the bed in there.

"I'm so upset Y/n." Aaliyah said, starting to cry harder.

"What happened?" I asked.

"John cheated on me." She said. My jaw dropped. She's been dating John for a year and a half and all of us loved him, even Shawn.

"Oh honey I am so sorry. If you don't mind me asking, how did you find out?" I asked.

"He told me that he didn't love me anymore and showed me the text messages with the girl he's been sleeping with. How am I going to tell my parents? How am I going to tell Shawn?" She said and asked. I thought for a moment before speaking.

"Well, what we could do is bring Shawn in here, and tell him. I'll keep him calm, I know how to. Then, together, you, me, and Shawn, will tell your parents. Okay?" I asked. She thought for a moment before nodding.

"Okay. Right now I just really need you and Shawn. Thank you for letting me talk to you about this." She said. I nodded and smiled.

"Of course. Us girls have to stick together because some men, such as John, are trash. You'll find the right guy eventually. I thought that I would never find the right guy, but then I met your brother, and he treated me, and still treats me, properly and right. Do you want me to go get Shawn now?" I asked. She nodded as she wiped tears away.

"Yes please." She said. I went downstairs. Shawn was sitting on the couch, fidgeting. He looked so worried.

"Shawn?" I asked. He looked up at me.

"What's going on?" He asked.

"I think that it would be better if she told you. Come on, let's go upstairs." I said. Shawn held my hand as we went upstairs and into the guest bedroom. Shawn sat on the bed with Aaliyah as I stood.

"Please tell me what's going on, I'm really, really concerned and worried." Shawn told Aaliyah. She looked at him.

"John cheated on me." She said.

"WHAT?" He yelled. I touched his shoulder and he looked at me.

"Don't beat him up," I said. "Everything will be okay."

"Everything is not okay. My little sister was cheated on. Man, and to think I actually liked him." Shawn said, shaking his head.

"Please don't hurt him Shawn." Aaliyah said. Shawn shook his head.

"I won't. Please tell me that you're not going to go back to him." Shawn said. Aaliyah shook her head.

"I won't, I promise." She said.

"Good. You do realize that we have to tell mom and dad, right?" Shawn asked. Aaliyah nodded.

"Yeah. Y/n said that the three of us can do it together." She said. Shawn looked at me and nodded.

"Actually, would you mind if I stole my wife for a minute?" Shawn asked. Aaliyah shook her head.

"Go ahead." She said. Shawn held my hand, took me to our bedroom, and shut the door.

"I want to beat him up." Shawn said. I held his face in my hands, rubbed his cheek, and shook my head.

"You just told her that you wouldn't hurt him, so please don't. Please, do it not only for your sister but for me too. I don't want my husband to go to jail." I said pleadingly. Shawn smiled and nodded.

"Okay. But I do want to have a talk with him." Shawn said. Oh gosh.

"You know what you should do?" I asked.

"Hm?" He responded.

"Talk to Manny privately about this." I said. Shawn thought for a moment before nodding.

"Okay. We should probably go back to her. Should she spend the night?" Shawn said and asked. I nodded.

"Yeah. I think that would be best." I said. Shawn nodded and we went back into the guest bedroom. Aaliyah was under the covers and asleep. Good, after what had just occurred, she needed her rest.

"Let's let her rest. We'll go catch up on our sleep too." Shawn said. We walked out of the guest room, shut the door, and I pulled Shawn closer to me.

"Thank you." I said.

"For what?" Shawn asked as he pulled away from the hug looking puzzled.

"For being loyal to me." I said. Shawn smiled at me, kissed my forehead, and leaned his forehead against mine.

"I will always be loyal to you." Shawn said. I smiled and placed a gentle kiss on his lips. Shawn kissed back but we soon pulled away.

"Come on let's go downstairs." I said. Shawn nodded. Once again, Shawn held my hand as we went down the stairs. We sat on the couch and cuddled and snuggled.

"I love snuggling with you." Shawn said.

"Yeah?" I asked. Shawn nodded as he looked at me with nothing but love, adoration, and admiration.

"Yeah. Do you like snuggling with me?" Shawn asked. I smiled and nodded my head.

"I love to snuggle with you. It's one of my favorite things to do." I said.

"What's your number one favorite thing to do?" Shawn asked.

"Just be in your presence." I said. Shawn smiled at me and kissed my forehead.

"I love that too. I love you my beautiful baby girl." Shawn said. I rested my head on his chest again and snuggled my head into it.

"I love you too." I said. We cuddled and snuggled, the blankets holding us tight, for a while before Aaliyah came down the stairs.

"Hi guys. Mind if I hang out with you two?" She asked. We shook our heads.

"We would love that." Shawn said, causing his sister to smile.

"Shawn? Y/n?" Aaliyah asked after a pause.

"Yes?" Shawn asked.

"Can we tell mom and dad now?" She asked. Shawn and I nodded. We facetimed Manny and Karen.

"Hi guys. Aaliyah, what are you doing at their house and not with John?" Karen asked. Aaliyah bursted into tears.

"He cheated on me. He even showed me the text messages from the conversations that he's been having with the girl." She said.

"Oh honey, I'm so sorry. Is there anything that we can do?" Karen asked.

"Just please be there for me." Aaliyah pleaded. Karen and Manny nodded.

"Dad I'm going to call you in a second." Shawn said. Manny nodded and they both left the rooms that they were in.

"Well I'll let you go and relax with Y/n, okay? You take care you two." Karen asked and said. We nodded and hung up.

"What do you think Shawn and my dad are talking about?" Aaliyah asked.

"Shawn wants to get revenge on John but without hurting him physically." I explained. Aaliyah groaned.

"Oh dear God." She said. Shawn soon walked back into the room, grabbed his keys and wallet, and turned to us.

"I'll be back." He said.

"Where are you going?" I asked.

"To hang out with my dear friend John." Shawn said. Aaliyah and I shook our heads but Shawn left anyways. Within an hour and a half, Shawn was back. Aaliyah was taking a nap.

"What did you do to him?" I asked Shawn when he walked in the door.

"We had a little chat over lunch. I told him that he could order whatever he wanted so of course he got the most expensive thing on the menu, and so did I. We ordered some really nice wine too. I told him that if he ever runs into my little sister again, he better not say or do anything. Then I told him that I had to go to the bathroom, but instead of going to the bathroom, I left." Shawn said with a smirk.

"But wait, John probably won't be able to pay for all of that stuff." I pointed out.

"I know." Shawn said, still smirking. I giggled and shook my head in shock.

"You're crazy." I said.

"You tell me that pretty often." Shawn said with a chuckle. When Aaliyah woke up, Shawn told her what he did. Instead of getting mad, she laughed.

"That's great. Thank you so much Shawn." She said. Shawn smiled at her.

"Anything for my little sister. Do you want to spend the night?" Shawn said and asked. She thought for a moment before nodding.

"Yes please. I appreciate this. Thank you guys so much." She said. Shawn and I smiled at her.

"Of course. Now, rest some more, you look tired." I said. She nodded. Shawn and I went back downstairs.

For the next few nights, Aaliyah stayed over before going back to her parent's house. She told us that she would forever be grateful for us, and we told her that we would forever be grateful for her. Although I'm not glad about what happened, I'm glad that she came to us and talked to us, and I'm glad that Shawn did what he did.