I have to disagree. If the girl is chio, even if she stay in HDB, I will still give her full attention, lick her from hole to hole. But if the girl is not attractive, no matter how rich, it is difficult to be engaged sexually. Women can lie down and pretend to moan. Man need to get erect and pump...
Don't forget, women love oral sex. If they are in a position of dominance, you need to lick a lot of pussy and asshole too... Even when I am with someone I am attracted to, I still need to distract myself like writing the alphabet with my tongue, from A-Z, Z-A a few rounds. This kind of things, very hard to fake... For women, its not about the penetration.
Unless you really need the money, I wouldn't advise you to be her lover. Just buy her dinner, joke around... pretend that you got a deep inferiority complex... You wish to be with her but in this lifetime, its just not possible. Thats why you can only love her from a distance, like mortals gazing at the moon. Say this kind of things, the girl always very song one... I always say this to girls that I dun wanna fuck.