Baso, when dat slapper katie gibsons dad moves mad too her at night and creampies her in the arse then gets her mum too eat out the shit and cum mix. Then brother comes when Katie and mummy are scissoring and dad shoves him on da same bed and fucks his arse, then whilst der doing that George sticks his dick in katie whilst mummy sits on katies face... definition done ygm.
by madman600and6 May 18, 2020

by Baybee Becky October 20, 2008

by JJ July 30, 2003

Getting your own mother pregnant, then getting that daughter/sister pregnant. Therefore, it's a sister within a sister. Inception + Incest = Incestion
by Lily69 June 13, 2012

by toxic cowZ May 26, 2018

by Alison Chaynes May 22, 2009
