My wife and I met with a very hung guy 3 times for a threesome and she loved every minute of it. So during the 4th time, he started to really pound her hard with the full length of 9 inches. She started holding him by the hips, then placing her hands on her upper thighs between them to prevent him from going all the way in, but he moved her hands away. I could see her grimace with pain. They changed positions a few times with her on top for awhile, which she really enjoyed again. Them they went back to missionary, and he started pounding away really hard again. At one point she said in a very loud and breathy voice You are splitting me open. She did not scream stop or anything at any time. Afterwards she said she though he was being a bit sadistic and did not want to return. If you were me, would you have intervened between them? Since she did not ask for help from me, I did nothing but wondered if I should have?