I was surprised to see James Avalon credited as director on such a mediocre "Mommy's Boy" vignette. There's no sign at all of his skill on the finished product.
The script boils down to little more than the title. In a brief set-up, college kid (overage Lucas Frost, 31 years old when this was shot) stepson arrives home and sees what he thinks is his stepmom sunbathing: he feels her up, only to find that it's Vanessa Sky, mom's friend, there instead. He utters the title line, stepmom Queenie Sateen shows up and bemused Vanessa says she's surprised at the taboo relationship they evidently have and would like to join in. Cue a lengthy threesome.
Nothing else happens in this throwaway scene, not very sexy or stimulating unless you've never seen a porno 3-way before.