So...would it bother you if you were with someone who had been in an 'intimate' relationship with your sister? My sister and I used to be quite close. I dated a guy in NZ and then come to London years after where he was, resumed the relationship, I broke it off we remained friends, he was going back to nz - with a job where my sister was working, told him must meet her etc, next thing I know she is having an affair with him (her partner away working) and then they are together. Nothing has been mentioned by her/him it's just an always generally uncomfortable 'vibe' when we are in the same room. I have no issues but feel like I am the 'bad one' as nothing has ever been said (a good example of 'sweeping it under the carpet') I just wonder if she does - I know I would if roles were reversed. How would others feel, just want to know what the general consensus is on this sort of thing...