Neither of you had meant for it to happen. You'd both been vulnerable and drunk. You were childhood best friends. But, you'd both kind of ruined that the second you both made love that night... and conceived. You'd both been too drunk to remember protection.
You kept the baby. You and Sam both came to the agreement that you should. But it was odd. You continued on the road with Sam and Dean... they'd both been like family... and now you were carrying the youngest brother's baby.
Now, here you were. Five months pregnant, and alone in the motel as Sam and Dean had run off to do stuff for the case. You only did research for them at this point, not wanting to get involved in hunts because of the babu. The tension between you and Sam the past few months had been unbearabley strained, and awkward.
Just then, you heard a key turn in the door, signaling the boys' return...