Would you be upset if you found another female clothes in your SO home?

I haven’t confronted him about it yet. But it may be his baby momma’s stuff and ik she had been over at his place before we started dating for sure (which was a year ago). But he did his laundry today and I saw a female sock in there which ain’t mine.

Just to clarify: I don’t think he’s cheating cause we been practically living together for the past few months (I only leave for the weekend to see my momma). I just thought it was weird that his bm shit pops up every once in a while and if I should confront him bout it and aks him to get rid of it?