Legal/ Get your sister involved
Suddenly an idea strikes you. Licking your lips, you slide out from under your mom as she takes one last long suck before your cock pops out of her mouth. "What's wrong honey?" she says slightly out of breath from the extensive tongue fucking you just gave her. "Oh, nothing! I was just thinking maybe we could get Maddy in on this too!" you say before aggressively kissing her, pushing your tongue inside her mouth, making her taste all of the juices she just put into your mouth. "Mnnn! That's a wonderful idea sweetheart!" she says between sucking on your tongue. "She's been failing sex ed and really does need some brotherly help. I'll clean up in here while you go get her." she winks at you as you break the kiss and leave the kitchen with your mother still dripping love juice on the floor.
You head upstairs and down the hall to Maddy's room. Her door is wide open as you look in to find her looking in a mirror holding up two different colored butt plugs with different kinds of furry tails attached to them as normally as if trying to figure out what shirt to wear. "Oh, whatever!" she says throwing both of them down on the bed. Just then she spots you in the mirror. "Oh!" she turns around and runs over to you before seeing your giant hard-on that still hasn't shrunk in size. "Wow!! I had no idea you were so big!" her eyes wide in amazement. You smirk as you feel a bit mischievous and pick your small 9 year old sister up "Yup, and you, me, mom, and dad are all gonna give it a ride!" you say as you carry her out into the hallway and down to your parents room as she laughs and giggles the whole way.
As you come into the room you see your mother is already hard at work choking down your dads hard cock on the bed. "Hay champ! I see you brought a plus one!" he says winking at you making Mandy giggle. This is all just way too much stimulation for you and you have to get in on this right this second.
Who's First?