Look at the Lady Boners! - DMSI V2.2 5.5G

[Shannon]

So far, materials (both BlackDragon and non-BlackDragon) seem to advocate being so good (at least sexually) that she can't resist you; she comes back to you if she was with someone else because the other guy didn't (or couldn't) satisfy her like you could, and/or she stays with you because of that.

Whichever way your wind blows, it will certainly be better to be "the best she's ever had" somehow.

That does not work. Being the best she ever had will not make a woman faithful, at least. Believe me. I was the best every woman I dated ever had, and went to extraordinary lengths to be so. It got me cheated on anyway, and used for sex. Now, I don't worry about it. Now, I expect that she will get from me what she gives back.

It fails because materials (both BlackDragon and non-BlackDragon) advocate being so good (at least sexually) that she can't resist you. Only, this is something she can get from almost every man for that very reason. Thus, you are no longer offering her something she can't live without.

What you need to do is give her something she can only get from you. I suggest you make that something emotion-based. Maybe give her someone she can trust more than anyone else, someone she is in love with wildly... something emotion based. Great sex, well, she can get that from every man, because every man wants to "be the best she ever had".