I have been with my DP for 5 years. We live together with my DS from a previous relationship and our DD. We got engaged 6 months ago.
When we got engaged, an ex girlfriend of his kept popping up out of the blue on Facebook/texting him etc. I saw all the texts and he kept it friendly but it was clear she'd found out he was engaged and was trying to 'remark her territory' or something. They hadn't spoken regularly or anything for years.
One night she called him crying, saying she misses him and regrets how things ended etc. He decided to block her number and that was that. We heard nothing until two weeks ago when DP received a request for a work meeting - with her. Trying not to out myself but in DPs job anyone can ring up and book a meeting with him and this is done through his secretary. He told me about it and I expressed I wasn't happy with how she's behaving. We kind of left it there and didn't speak about it as I assumed he'd cancel it and continue to ignore her.
On Friday night he came home and after a while told me he'd been to meet her. They spent a few hours talking, catching up, talking about me (apparently). I feel sick to my stomach. I do trust him but it's very clear what this woman's intentions are and I can't fathom why DP would then choose to meet up with her to 'chat'. He says he understands why I'm upset but that he'd never do anything and I should trust him. I do but this has still really upset me.
Am I overreacting?