When any number of people are related (fellated) by means of the act of
fellatio, be it directly or vicariously through one female
fellating several males. Both females and males can be fellated, by having
blown the same guy, having recieved from the same girl, or blow brothers, who have each received from the same female. No male on male action allowed
Susan:So whats our
fellationship?
Steve: Well you gave Jim dome, and he got dome from my girlfriend, you tell me.
Susan: Ohh so we are fellated. I'm your step sister of sorts because I blew Jim who was blown by Lucy, meaning I've blown you by means of a substitute
Steve: We can change that right now... (unzips knickers to receive
sloppy dome session followed by gratuitous money shot on
Susans face)