Secretly sexually active

So I have a gynecologist appt set up soon and you know they always ask you the lovely question of if you’re sexually active or not. I don’t mind telling the dr that I am but I was raised in a strictly Christian home and if my mom find out I’m a dead woman lmao. I’m soon to be 20 but she still comes with me to different dr appts occasionally cause I have a lot of health problems. Is There a way that they can not bring up the fact that I’m sexually active in front of her if she does come with me to drs appt sometime? (not a gynecologist appt). I just don’t want them to accidentally slip up in front of her.