This was suggested by @fanfictionlover_5678
Thank you!!!
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Pietro was woken up by a tiny bit of weight on his stomach. He opened his eyes to see a cute baby girl with a sticky note on her forehead. Pietro picked up the sticky note, and read it. "You have to watch (Y/N). I am busy. I'll pay you later. -Tony." He read outloud. Sighing, he picked up the baby girl. "So, we meet again, (Y/N)." He sneered, jokingly. The adorable baby reached for his white hair.

"Slow!"
"I am not slow! I am quick! I'm QuickSilver! It's in the name!"
"...slow!"
"Quick! I am Quick!"
"Slow!"
"Quick! Fast! Speedy!"
"Sloooooow!"
"Loki has warned me about you and one word replies. And I will not stand for your bulling and-"

Pietro was cut off by a kiss on the cheek from (Y/N). Confused, he blinked. Wanda just so happened to have walked in the room.

"Aw, your first kiss." Wanda gushed.
"I didn't see that coming...." Pietro muttered to himself.

"Slow!"