On not contacting Girls...

[Victorvdb]

If she wanted it to be a one-sided open relationship, there is no point in continuing. She'll be flirting / looking for / random assorted activities that include, but not exclusive to, meeting guys in hotel lobbies for drinks, pantyshopping etc and that's gonna drive you crazy. Why did you, or you two, decide this should be more than a fuckbuddy relationship anyway? Sounds like you had a good setup, but had to ruin it by getting notions of standard relationships involved.

Next time I'd advise against potentially adulterous sisters of exgirlfriends. I hope she / they are not from a family with 10 daughters?