Tell your girl to stop the nonsense chats, she is your girl who you intend to settle down with, so she must respect and obey you, if not let her go cos she will continue such act in your house as wife.

girls love bad boys like me,we are irresistible.
U need to show ur gal u can be bad as well.
On the contrary why don't u just man up and tell the guy 'stay away from my gal.'

Dude just listen to urself... U can vouch for her being faithful... Ur babe enjoys all those shits from d dude that's why she can't stop.. She might even be nursing the fantasy of being banged by the guy that is if e never happen sef.. . So my advice is confront her and tell her ur mind.. Show her u are the one in control and stop behaving all too gentle.. It doesn't always work.. But don't include violin anyway