These are the looks of two people that are trying very hard to keep a straight face.
This roommate is very religious. Their roommate isn't. It's a common point of contention between the two.
It's very, VERY rude of these two women to photobomb this picture of a man taking a discreet upskirt shot at this wedding.
The real question is if the boyfriend still thinks two chicks kissing is hot in this situation.