It happens when your girlfriend is extremely unstable by default, even more so after a fight, comes to your parents house drunk in the middle of the night and essentially shames you for trying to reject her advances while simultaneously being physical about it by forcing you down and assuming you’re playing some mind game while you try your best to avoid waking your parents in the next room and making a scene cause she’s being loud and borderline belligerent. The sheer embarassment is enough for personal boundaries to get absolutely stomped on in that situation.

Life is living among infinite shades of grey. Every situation has nuance that you might not have thought of.