[Volleyball]

A contributor has already mentioned leg wrestling which is fun, sensual, and if she has some lower body strength might be competitive. You might also try sock wrestling. One playful variant has both wrestlers blindfolded each wearing a single sock. the goal is to remove your "opponent's" sock. Needless to say, do this beginning in a kneeling or prone position in a place where you won't damage furniture and hurt yourselves. Leverage, balance, and stamina are important in wrestling so she might do better than expected. Learn a few basic holds beginning with the half nelson which can be used to immobilize your opponent, and also is useful in rolling an opponent onto their back and into a pinning situation. Novice guys frequently rely on upper body strength, and women wrestlers can use their legs to immobilize, roll, and eventually pin some men. My gf and I both use erotic holds to distract and weaken each other....and in that case one of us might end up pinned, but we both win. Check out youtube vids for mixed matches to gain knowledge of holds and moves. Most importantly, be safe and have fun.