Im going through pretty much the same shindig with the new misses at the moment, only spanner in the works being her ex told her he still has feelings for her the day after she told him we were taking things further...Oh did I mention he still has a gf lol??
So yeah, she still wants to hang out with him over the summer which is cool with me I guess, Im not gonna dictate who she can and cant see...Although I have to admit it doesnt exactly make me the most comfortable Ive ever been. I trust her, I mean she has always been open about it all and even offered to only see him with other friends around too, but again wouldnt want to stop her doing anything she didnt want. Its the **** of an ex I dont trust lol, but I guess that will always be the case...so I guess my advice will just be take it with the biggest pinch of salt that you can. Tough I know, but to be honest...what else can you do?