no hate

okay so 2 nights ago one of my brothers masturbated i know bc i saw him when i went to go get water he masturbated in the couch (thats where he sleeps) the next day i was sitting in the same couch he masturbated in and i masturbated and i used the same blanket he used to masturbate it was the heat of the moment i totally forgot he had masturbated there but i masturbated in the afternoon he did it at night what are the chances of me being pregnant and the sperm being alive in the blanket idk if this makes sense