it's probably a good thing sam grew up with dean and not deanna because sam would have knocked her up by the time he was 14.
the same thing would happen with omega dean. dean presenting as an omega speeds up sam's own presentation as an Alpha and every time dean goes into heat in whatever apartment or house john is renting for them, sam smells him through the walls and his hind brain goes into overdrive. sam's only 13 and he doesn't even really know what his knot is for yet but something primal kicks in and he starts biting and clawing at the locked bedroom door so he can get to dean. whining dean's name as dean whimpers softly behind the door. john has to haul him away with splinters of wood under sam's fingernails and in his mouth and get him outside to clear his head from the thick cloying vanilla slick scent of dean's heat. sam sinks his baby fangs into his forearm trying to get back inside and john's left with bloody indents all over him. he spends the next three days trying to look after dean while keeping sam away from him because he knows what will happen if he lets the boy anywhere near his older brother.
