Sex before marriage ( friends with benefits)

Ok i may confuse you but i am a Christian but my real dad and step mom and mom and step dad are not but i have a dad and mom that i call at my church my mom and my dad and i have talked to my mom at my church about this but i know what she wants on not wanting me to have sex but i am really thinking about having sex and ya ... I kinda have a friend with benefits and i want do more with him ( sex) but im afraid about what my mom at church is going to do/ say or even be mad so any believes and any thoughts ...