As said just get her 2 change her number, no point going round with blokes to have a quiet word as he wont take u seriously if u cant do it on ur own, and chances are will either not come out or fook off inside when he sees them.

Rumors dont mean fook all anyway so i wouldnt be bothered and as said change her number, is better anyway so any cock who previously would have had it wont now!

Had 2 do the same thing with the current gf as she was getting shit off ppl, changed her no. and job done.......kinda