mom's feet
The sexy toes, soles and feet of a mature woman, usually on public display.
Fred could not keep his eyes off his best friend's mom's feet. She always kept them up on a couch when he came over and he desperately wanted to cum on them.
mom feet
This is that thing of when it's been cold, close-toed shoes weather and you're a mom who is very busy caring and providing for your children and you'be fully neglected to care for your feet and now they look like they belong to a monster. A momster. Momster feet.
No I can't wear sandals today, I still have mom feet.