incesterbation
When you have sex with your clone, your doppelganger, or a version of you from a parallel universe.
If you clone yourself and then have sex with the clone, it is neither incest nor masturbation, but both: incesterbation.
Incesterbation
The act of having sex with your clone; a mix of masturbation and incest.
Spotti cloned herself and I caught her incesterbating, and it was awesome. It was some pretty hot incesterbation.
Genderbent Incesterbation
incesterbation but when the clone of yourself is genderbent, and not a clone with your biological gender.
Man, have you ever wanted to have Genderbent Incesterbation? Male me would be so hot!