I'm a married housewife and my husbands cousin recently moved in his cousin is extremely touchy feely always trying to hug or touch me in some way and when i have brought the issue up to my husband he said he would have a conversation with him but now he just does it when my husband isn't home and it makes me feel very uncomfortable because he does it infront of my children and around my mother what do i do?
It sounds like a difficult situation. I'd get some sort of a recording device with you, and make sure you get some sound- and/or videobytes of his behavior around you. It will not only help explain things to your husband, but God help, if this escalates in an unforeseen and unwanted manner (and the way you describe this cousin, it sounds like you at least seem to think that could be a possible scenario), it might even be of use in that case.
The lock on the door idea also sounds like a good idea, both for protection and to get a message across.