Do you want to pursue this as a relationship or just a sex fix?
Women have no problem sleeping with guys, tied up or not, women do cheat. Seeing as she is single, thats awesome, but she could regard you as a rebound.
Consider changing her state from the presumed mild depression she is in from the break up to one of enjoyment and pleasure of being with you with a hint of sexual tension (****y funny, bust on her present actions)
Dont bring buddy up, dont even think of him nor let her. If she brings him up be like whoa, are you with him right now or me, cause I thought my name was _______. or something equally retarded that she can find humour in if the mood is right. That's your job if you want to succeed with this girl
Yeah dont be her therapist, she has friends for that, and if you tell her that she will respect you and look at you more of a man and sexual liaison versus a chick with a **** she can talk to. right?
Show sympathy by not bringing him up, but not by sorting her problems out.
Show manliness by providing space for her to relax and forget hre troubles (busting on her, fun activities (funny movie, if weather allows it miniature gold or something she will enjoy).
Remove those negative feelings she has while she is with you and she will see in you an escape, and if its sexual she will just allow it to be so.
My two cents.
Would you like me to clarify anything for you Alex or just provide any more insight I have?