mixedmedia

Frankly, I'd be worried about her state of mind and fitness to be emotionally involved with if she were being treated that badly by her boyfriend and then having "sex all night" with you when she's in town.

Like the previous two posters have said. Help her get out of the situation she's in, then concern yourself with a sexual relationship with her. Otherwise you could be contributing to the instability of a confused and delicate psyche. Just my opinion. Good luck.

__________________
Most people go through life dreading they'll have a traumatic experience. Freaks were born with their trauma. They've already passed their test in life. They're aristocrats. - Diane Arbus
PESSIMISM, n. A philosophy forced upon the convictions of the observer by the disheartening prevalence of the optimist with his scarecrow hope and his unsightly smile. - Ambrose Bierce