Your parents go to the movies

Nine days you wait and then your mother tells everyone their going to see a movie. She asks if anybody wishes to go with them. You and your sisters tell her you have to much home work.
Then you get Kelly to call Judy and tell her its tonight.
Judy arrives a few minutes after your parents have left.
You then have all three girls undress in front of you. You have them kiss each other on the lips.
At first they seem a little nervous about doing things in front of you. But then Kelly tells the others to ignore you and just do a few things to each other.
This seems to work as she brings out her toys.
Stephanie grabbed a strap-on and told Judy it was her turn to use it. While Stephanie put it on Kelly went down on Judy to get her nice and wet.
Once Stephanie had the strap-on in place you notice some of the strap-on even went in to Stephanie's pussy.
She added some lube and then Stephanie and Judy got in to position.
Stephanie lay on her back and Judy lowered herself on to the dildo. You watch them as they get started. You then tell Kelly to get ready. You then lay on the floor next to Stephanie. You then have Kelly put lube on your cock before mounting you.
You watch the dildo go in and out of Judy's pussy as your cock goes in and out of your sister Kelly's cunt.
Half way through the fuck you tell them to swap partners. Judy gets on your cock and Kelly gets the dildo. Her pussy is well stretched by the dildo. But she some how tightens her pussy muscles and you can feel her hot wet pussy as she rides you. You blow deep in her pussy. You pull out and you then tell her to sit on Stephanie's face.
You watch as Stephanie licks your cum from Judy's pussy. You have blown once but you still have plenty of time to get it up again. In the mean time what will you get the girls to do to entertain you?