My mom is usually so serious that I can't even imagine her doing anything naughty. But one day, she was sniffing my and my dad's underwear and socks before they were washed, playing with her genitals, and masturbating while smelling my pillow. Mom, not only didn't get embarrassed when she noticed me, she pushed me down and forced me to deep throat and lick my balls, and even put my dick between her tits. I didn't know what to do, but I was a guy, so I got a big hard-on and pulled it out in a flash. Dad would be surprised if he knew (lol).