Affair discovered

[STH17]

W texted me an hour ago saying she wasn't going to make it home tonight. I decided, or reacted emotionally, by coming to sleep in the bed instead of the couch I've been on for the last several months. I can't sleep though. I didn't respond to her text. I assume she is sleeping over at AP's place. Do I keep pretending I don't know or don't care? what would I say? Thanks for the heads up, have a good night? That makes me sick. "Don't bother coming back" is more what I'm thinking. I think I've seen enough to confirm an affair. I don't want to carry her shameful secret for her. I don't even know if she feels shame, or maybe just fear at what I would do if I found out. I'm angry now that I'm spending so much time worrying about what she thinks. I'm not going to reply to her. Not this time. I get to give myself that much. I don't even feel comfortable in my own bed anymore.