You saw Chloe push Beca up against the wall by her boobs and keeps her hands on them. You walk over with a straight face and clear your throat, as you give them a raised eyebrow.

"As much as I love Bechloe, I don't love your hands on my girlfriend's boobs babe..." she immediately takes her hands off and blushes. You press your lips against her cheek before kissing your girlfriend's lips and walking to meet up with the group.