Arranged date?

There's a man in my church who my mom wanted me to go on a date with. He asked me out and I had obliged because he was cute and I was told he treated women perfectly. This man and I have texted a little since he had asked me out and almost each time we exchange words, he brings up some sort of sexual act. I told my mom I didn't know if I really wanted to go out with him and she insisted that I give him a chance because he planned a date and is willing to take me out. But from what I understand he just wants to hook up, but I can't tell my mom that. I'm a pushover and I am unsure of what to do considering the date, which is tonight.