We have good sex, but she just doesn't climax during penetration. I can get her too orgasm using oral stimulation (and that takes a while) but not with my penis. She's a little on the heavy side and is a little uncomfortable with her body. I really just want to please my wife. Preferably without outside help (vibrators). I want it to be as a result of my doing. Any tips or advice? She's 5'1 like 220lbs african american if any of that matters... Help!