My husband and I were at at party at an Airbnb. I went to bed earlier and he stayed up later.

I woke up to him sobbing in bed beside me. He told me he took a bump of coke (he never does drugs for for some reason gave in to peer pressure this time) and accidentally had sex with another girl.

He said that she had pulled him towards her and it just happened. He said he realized it wasn't me when he felt her breasts. He pulled out and didn't orgasm. He seems distressed.

I want to believe it was a genuine accident but honestly I have never done coke and have no idea how it affects a person mentally. Is his story believable? What do you think?