How about a follow up. erm just curios to see what happens next....nothing else !
it's not uncommon for siblings to experiment. i wouldn't be surprised if they went down the road of getting caught using dildos on each other and subsequently being blackmailed and forced into doing degrading sexual acts to prevent their father from finding out.
I admit, I never thought about their relationship from this side before!
This is a great new thread! I like where its going