Sex for first time!

Well I've been seeing this guy for a few weeks now, & yesterday we had our first kiss! He's an amazing guy, very motivational & a man of God! We have a wknd planned to spend time with each other, because my daughter will be away & he doesn't have to work! I feel like sex might happen this wknd! If it does; am I supposed to say anything... Or just let it happen? What do you say before your first time having sex with a new guy?!? Help!!