Sister hanging out with my ex?

[guessagainnn]

AIBU in this situation, or do i just go along with it and not over think?

Me and my ex partner separated around 5 years ago, it had ended poorly on my part which i take responsibility for completely. I have since moved on, have a partner and 2 beautiful children.

My sister who is much younger than me bumped into my ex (who i should add was very much a big part of our family when we were together) and have since been meeting up and going on days out etc. Its not uncommon knowledge to know that my sister had a major crush on my ex when we were together, not sure if she still has those feelings. However after their outing today, he was invited back into the family home and spent a few hours with my parents like 'old times'. Barring in mind he must have felt a tad bit uncomfortable with photos of me, my children around etc.

Anyway, AIBU to think that this is a bit if a strange situation, how do i even deal with this? Or should i just accept it and leave it as its not my business?

I agree with this too.

Also for the posters talking about how this is the ex’s way of ‘getting back’ at the OP, I can only sigh and assume the posters writing this are very young.

If you've both moved on why would either of you be uncomfortable? Treat him like a brother.
I married my sisters ex 30 yrs later. She wasn't the only ex at the wedding either!

I’m with you

I also don’t get why some are saying that it’s probably him getting revenge.
The op hasn’t said he’s a bad guy and it’s been five years. Why assume he’s been hanging on to some kind of bitterness that would manifest itself in this way out of the blue.

Or even that he’s the sort who would use the op’s sister for some kind of two sisters thing