I dated her for a few weeks and had sex twice but decided not to be interested again she claimed she's engaged to another guy. After one and a half years, myself and her sister start to date. We have not had sex yet but the question keeps coming to me if it will be right to have sex with her or probably to call the relationship quit.

As long as she knows you were with her sister in the past. Don't hide that part - if it "works" between you two, that alone can ruin it.

Don't know if its right or wrong... but it might just be a bit weird...

Sisters talk you know... so the topic of you in bed might come up... and that would be quite awkward...

If you actually like the sister then why not, assuming you are both ready for it?

If its just revenge then...


Thought the title was going to say "at the same time"

Sisters talk you know... so the topic of you in bed might come up... and that would be quite awkward...

Unless he's any good, then it works in his favor. :D

A year and a half is a long time, I say she's fair game. Do whatever you feel like doing.