Ewww! omg my step brother is so gross!!??

talk to him, tell him that it makes you really uncomfortable. and you say that you've only met him for one month, whats up with your parents how long were they together before they got together? i think that one of your parents should listen to you. and if he ever tries to touch you in anyway then you seriously have to bring it to your parents attention. and ask your step brother if he would do that if you two were really blood brothers and sisters.