Re: 99 Problems - oh actually, no, make that 100 Problems....
I agree with PUAatmosphere, nothing wrong with having a female friend. friend zone is not that bad, if this woman is that much older then you then she can teach you quite a bit. Guaranteed this Mel girl has a good read on you by now. Women are just good at that, she can probably tell you things about yourself that you had no clue she knew. If you develop a good, honest friendship with her she can be of major help in developing your PUA skills (wardrobe, date ideas, decor of your home/apartment, etc...). Let her know that you are looking to improve your love life and ask her for advice. Since you have good rapport with her, i'd be pretty sure that she would be extremely happy to help you out (would probably make her day). I think this would work for you a whole lot more than trying to seduce her, especially if she's married.
Don't screw up this opportunity for a simple lay with this girl (which may or may not happen). Either way, the reward will be much less than having a good female friend that can give you the inside scoop on things. You can even introduce girls you meet to her as being a friend of yours, then afterwards solicit her feedback on what she thought of the girl. So many ways to utilize a friendship with a cool girl to help you grow as a PUA. (Mystery has female friends such as Tara that help him)
Hard work equals hard bodied sexy women in your life. Picking up women = putting in the time and effort go get good at it. Most naturals have put in this time and effort without it appearing as time and effort to them!