I tried it with the Ex?

My gf and I trying to get back together after a 6 month break. We have been together for about 8 years. We had an open and swinging type relationship most of the time, it was mostly for her but I enjoyed that lifestyle also. Problem is she can't get enough sex. She has had some therapy, for this before I meet her, ever since she was about 8 years old, but none since she was 16. She is 40 now. I realize that I can't totally satisfy her so I have again continued to let her seek some outside "help". But again that has started to become a problem for us, If I try to tell her no, or get her to slow down on how many guys she is seeing, she gets mad, even violently, and thinks that it is all my fault, my problem, and she is ready to run out, or get me so mad I throw her out. She will say that I am too controlling and not letting her have everything she wants. I do give her almost everything she has wanted since she came back that we can afford for her to have, and have given up on most all of my outside activities. I stay home for her as much as possible, leaving only so she can see other guys. Our sex life is good, not great but close, and getting better until I started to complain. Now it looks like it is going to end again. So should I give in and let her have her way, I love her and will miss her and the sex very much. I don't think I will ever find a better match for myself sexually. Sex is important to me, but its not my life as it is for her. Or should I demand that she seek treatment for her problem, and try to get her to become more normal. I don't think she will go for this now or ever or would have tried it. Or kick her out again and get on with with my life, as a single horny never, as she is happy living this way. Most of those close to me will say to dump her, but most of them just want to sleep with her and will as soon as she is away from me, even thought most have but don't when we are a couple. I'm not jealous of what she does, unless it is without my knowledge, which is rare, she is veryt jealous of me being with another girl so I very rarely do that anymore. We spend most all our time together and talk about all of our feelings.She says that toys just don't do the same thing for her, but I don't think that she is being honest with herself, and maybe could use some more therapy. She will say it is my problem for not accepting it, she is bi-polar and will sometimes want to be with only me, and will act like I'm the one with all the sexual problems. I'm willing to help her if she will work with me but how do I get her to agree seeking this help with me.