As Mark entered the bedroom his eyes lit up and his cock rose, as he saw his mom (nude) in the center of her bed, with her legs spread wide, the soles of her feet planted on the bed, and her fingers within the opening to her vagina. Her fingers were coated with a combination of her vaginal fluid and his recently deposited semen, as they manipulated her fuckhole.
The sight was too much for him, so he crawled between his mom's outspread legs and his fingers joined his mother's in pleasuring her pussy.
"You like your mama's pussy, baby?"
"I love it mom."
"Good, cus I need some cock....