Its all about like or dislike dont do forcefully may be she vomit and end with all messup lolz
U can teach her via porno or lick her till dead end the push ur dick on her breast over body then give near her mouth may be first time she neglect but after some time she will start but aware always wash ur penis before dipping her mouth read her what she like then may be u will drag her needs as u want ... best of luck bro