He enters

James opens the door and enters
"mom, what happened?" he has a glimpse of his mother fucking herself with the dildo before she covers her lower part with the pillow. Either ways she can't avoid moaning from the pleasure it's giving her before
"what do you mean, sweetie?" she asks with her face red in embarrassment. She has been thinking in James as she masturbated, and having him here has her even hornier.
"I saw dad leaving... and he seemed quite... upset"
"Oh... It's just that he's had a hard day..."
James denies "Mom, at home we talk openly about sex, and we consider masturbating as an activity to be done with as much viewers as possible inside the family" he orders her
"Oh you're right. It's no sense to hide it... Your father didn't work in the bed... He was unable to get hard..."
"Oh... well as you said he must have been tired..."
then James gets ready for leaving "Sorry for interrupting, I should have knocked the door..."
"Wait James..."