When your Step-Mom wants to suck the thick cock of your guest at your home, you may find yourself sitting in silence as she opens her mouth and devours your man's manhood. In fact, you may not be able to do anything about it because, as a matter of fact, there is no law that specifies the size of your manhood, thus, you can do whatever you want with it as long as you do not hurt your Step-Mom physically or mentally in any way. However, this does not mean that you should do this sort of thing without consulting your doctor first. There are certain medical conditions and health issues that can cause you to feel dizzy when you are having sex with your Step Mum. In such a case, consulting your doctor would be absolutely necessary and you should not try to do it without it..