for years my wife would never touch herself during intercourse, then a few years ago she started rubbing her clit when I asked her too while I was busy pumping her to peak her orgasms. This has gotten to be a regular any time we have sex with her on her back. Doggie style she can only rub her clit a few seconds until an orgasm hits and she is unable to rub for a while.
anyway, now usually our foreplay end with me above her rubbing his clit while she sucks my dick and rubs her stomach. This goes on through a couple of orgasmic waves until it builds to the one where she can't stand it. Then she pushes me away and rubs off a big crashing one while I move around and get my dick head between her pussy lips. When her orgasm starts to go away, i start pumping and she rubs off another one and then I take over rubbing her clit while a few more waves hit her. We may finish in that position or switch to another but by that time she doesn't play with her clit so much as rub her stomach some more.