Scenario 1.) Fell and his Brother (Or Boss) Got in a fight that lead him (Fell) to get kicked out for a bit. He decided to go in underswap where he knew that Blueberry would probably let himself live with him and his brother, After living with each other for a bit things started to get....romantic.

Scenario 2.) Fell was in heat....Thats it.

Scenario 3.) Custom:P