Found a shirt that’s not mine

I just found a random ass hot pink shirt in my dirty clothes. I know it’s not mine, I don’t wear hot pink, I don’t shop at the brand it’s from, and it’s not my size, I’ve never seen this shirt before. And I’d definitely remember wearing it considering it was right underneath the top layer of dirt clothes in my hamper. My husband got off work early today and was home for a good 2 hours before I got home. I asked him about it, but of course he has no idea where it came from or who it is. I really don’t think he would cheat. But idk where the fuck this shirt came from 😓