Unprotected sex with my manager

My boss and I have always played around and flirted with each other, so this one night it was really dead so i went into the walk in freezer and was about to steal a piece of cake when my manager came in and started making out with me! After about a minute he just walked out, didnt say anything. So later that night im walking out to my car and he follows me out, pushes me against my car and starts making out with me again! Only this time hes grabbing my ass and calling me sexy and stuff. Then i went home. A few days pass and then one night he texted me in the middle of the night and told me to meet him at work. I go there and park next to his car, he hops in and told me to drive and park in the neighborhood behind work. We park then he pulls out his penis and tells me to suck it, i do for about 10 minutes then he tells me to hop on, and remember, were in a tiny car, so i get on top and we go at it for maybe 5 minutes and he ejaculates in me! He asked if i was on birth control and i told him no and he just said oh well. None of this is the bad part... Whats bad is that im 18 and have a boyfriend who ive been dating for three years and my manager is 13 years older than me and has a wife and kids! Is this normal?