An Incestuos lesbian. Two sisters that have sex.
Twins that have sex with eachother in a porn are incestbians.
מאת Amanda Ferguson 24 בספטמבר, 2007
Two related females participating in sexual acts together.
Isn't that her sister? Yes, they are incestbians.
מאת Merideth Factsterburny 25 באוקטובר, 2010