Name changed for this...
Found out today via a flippant comment from my mother in law that when my husband and I first met, he was seeing someone else and there was an overlap between that relationship ending and ours starting.
To my knowledge at the time (and for the past ten years until today) we were both free and single when we met, and we were 'exclusive' from day one.
Have spoken to him about it briefly and he can't believe his mum mentioned it. We've never talked about past relationships - it's something neither or us want to hear about the other, so we've never gone there. But this wasn't a past relationship, it was a current one.
He says the crossover was minimal but the reason his family knew is because there was a family event that he took his ex to shortly after we got together because 'it was already booked' (hotel etc). I don't know exactly how long this crossover was.
So my first issue is the fact that he lied about something fairly major at the very start of seeing me. I have always considered him to be a good, honest and decent person and this revelation has really shaken that belief.
The second issue is a sexual one. The thought that there was a time when he was sleeping with us both has really upset me. I had a HPV result on a smear (several years ago now), and needed some treatment. At the time I was asked if my partner or I had slept with other people and I actually laughed at the suggestion...! Now realise this is exactly what had happened.
I feel like it's shaken my world. But at the same time it was so long ago, we're married and have kids now. But I feel like the whole basis of our relationship was built on a lie at the very start.
AIBU to feel this way? Really struggling to get past it.