"If you don't bang him stepmother, I will do it for you" is a great motto to have when dating a stepmother. Especially if your not sure if he will go for you or not because there are many things that you need to consider before having sex with him. When dating any woman who has children you need to make sure that they know your intentions, so that way if they do not support the threesome idea you can tell them in no uncertain terms that it would be better for you to wait. There is no doubt that if you do have a threesome and he supports it you will be able to enjoy your time as much as you would if you just went out with just your girlfriends, and we can all agree that the former is more fun!.