He watching her

"Could you watch as i masturbate? It's umproper to do it alone"
James nods "All right, mom if you're sure that is what you want"
James takes a seat aside and loks at his mother fucks herself with the dildo.
As she does so, she can't stop looking at his direction, and he's quite sure it's the bulge under his pants what she's looking at.
Soon she's soaking the bed with her juices as she cums
"T-t-thanks James... You've been very helpful"
"It's a pleasure, mom... Next time you may suggest to masturbate together" he orders
A big smile appears at her face since it'll mean she'll see your cock as you do so "Oh, yes, dear I'll love that"
Then she goes to the bathroom to clean herself "I'll prepare dinner in five minutes"
You smile, knowing now you've both your mother and sister falling in love with you... and your father is starting to experience gay sex... Maybe he'll even **** him to enjoy it