If your mom allow you to have sex with her & you don't wanna make her pregnant its ok. Don't care what others say its your & your moms personal matter so only.
Well, while I haven't actually slept with my own mom, I have read tons and tons of Ask her to have sex with you, and on the off-chance that she refuses, start.
IAMA Man who had a sexual relationship with his mother. . life because I could tell that my parents would have sex after my mom serviced me.