So I'll start with the context, my DH and I have been together for 6 years, married 2 and we have a 15 month old baby boy. We are very happy and I feel secure in our relationship.
Before me, he was in a 2.5 year long relationship, he was young as was she and they broke up 2 years before we got together. He was honest about the nature of the break up, he didn't cheat but he did treat her terribly, break up with her and sleep with her best friend in the same 48 hours!
They became friends after about 6 months but they don't talk or meet up, no wedding invites (she has also since married and had a baby). He follows her on instagram, comments occasionally etc.
I've known all along his parents still talk to her. I thought it was odd but I think she became a bit of daughter to them. They see her when they are in London and when she is in there area she pops in.
Well we are currently visiting in-laws for the week, and going to a wedding in the area at the weekend. Today I was in the garden playing with DS when I hear "OMG I didn't know you were here!", what do I realise his ex, her DH and DD are in the front room, with flowers and a Fortnum's hamper for in-laws (was their anniversary recently).
They stayed for about 2.5 hours, I thought maybe it was random and they were just in the area. DS and their DD played then DH suggested they both nap in DS' cot - I don't know why but this made me uncomfortable. I don't want my DS napping with DHs exes child!
They were all just chatting away and it seemed her DH was more comfortable and ok with it all than I was. Turns out they are in the area for the same wedding and in laws have now planned dinner for us all on Thursday night. She was lovely and seems happy with her partner but I'm sort of jealous of her, she's a lot more attractive than I am, I knew this but seeing her made it real (she had no make up on wasn't dressed up and was still gorgeous!).
After they left In laws apologised saying they forget they had invited her over today and we don't have to go to dinner if we don't want to. DH said no it's fine he wants to go! I don't!! She's his ex it's uncomfortable.
AIBU to be really pissed off with in laws and DH? It's fucking weird right? I won't be going to dinner on Thursday, nor will DS. DH has said it's fine but he wants to go!
I'm tempted to say DS and I will just go home, I don't know the couple getting married and would rather not spend my annual leave with his ex!