You guys are all missing a key element of the wobbly H. Yes, it involves two guys doing a girl, on her hands and knees, at each end--one getting a blow job and the other doing her doggy-style/up the ass. HOWEVER, the wobbliest is NOT merely due to the thrusting, but mainly because the two guys are armwrestling on her back. Furthermore, whoever wins the armwrestle is not cheating on his gf. Also, the girl is not cheating as any boyfriend, even if not personally involved in the wobbly H, should be glad to allow his gf to participate in a wobbly H.
Dude, you lost in the wobbly H? Shitty.