Long story short, we've been married for 10 years with 2 kids (7&4). When she was pregnant with the second child (now 4), we found out she was HIV+. Everyone got tested and neither me nor the 7 year old kid was infected. Thankfully the younger was born without transmission and is happy and healthy.

I asked her how she got infected while we were married i.e. did she cheat sometime after the birth of our first. She insists she doesn't know how she got infected and must have gotten it accidentally before we got married i.e. more than 10 years ago. It doesn't make sense in my head and I think I'll go mad thinking about whether she cheated on me while we were married. The outcome is very sad ofc for her but for my sanity, i need to make sense of it. Was she cheating or can there be any benefit of the doubt that she got infected 10 years ago, had a child who is not infected, has a husband of 10 years who isn't infected? P.s no IV drugs involved so that's no a possibility.