update - found a condom in my husbands work pants

Thank you all for your replies. I didn’t expect to get so many responses.

I didn’t confront my husband about it. I remained calm and scheduled an appt to the doctors for an STD test. I went to get it done and later that day, my sil called me and we chatted for a bit. She’s a single mom so she was like “hey, has Tony been busy lately?” and I was like “kinda. just work and his usual stuff” so then she brought up how she told my husband that her oldest son/my nephew (14 yrs) started being more curious about sex and since there’s no other father figure in his life other than my husband, he offered to help him out with sex ed and safe sex and guess what, how to put a condom on. So my husband had the condom to help my nephew out. I never told my sil about what I found since I was trying to gather more evidence, but now it was clear what happened. I checked my lab results on my kaiser app and no stds were detected. 😅