I just need a place to let this out.

Last week, I (29F) caught my husband Jack (30M) cheating on me with his stepsister Claire (24F).

I went out with a friend last Saturday and planned to stay at her house. Jack didn't want to be alone all night, so he said he'd just go hangout with his stepsister (they've always been close), and they ended up going to a bar.

I was feeling unwell and just wanted my bed, so I decided to get an Uber and head home.

I was not expecting to walk in on them having sex on the couch... I literally threw up on the floor by the front door.

They told me they were drunk and it just kinda happened. I screamed at them both to leave. Jack refused to leave and refused to sleep on the couch, so I ended up leaving anyways and went back to my friend's.

I am still in shock that he actually slept with Claire. I think I'm gonna file for a divorce. I am so overwhelmed and uncomfortable.

Has anyone else gone through this? Please message me if so, I feel very alone and confused. Also, do I tell their parents that's why we're gonna get a divorce?! I've been isolating myself a lot because of this.