What Did I Do Wrong?

Prologue

             Of all the things Castiel Winchester thought he would feel on his birthday, the one thing he didn't expect to feel was dying. He was excited to spend the day with his husband, elated that his boss Cain gave him the rest of the day off. He was expecting to see his husband surprised, yet happy as he walked in the door later that night. The confusion he felt when he saw his husband Dean's beautiful impala in the drive way scared him. He trusted Dean but was terrified of what he would see once he walked in.

             His fears came true when he walked in and saw discarded clothes all over the sitting room. What hurt was among the boxers and jeans his husband favored, lacy petite panties and a lacy bra that belonged to a woman. Castiel's heart beat pounded in his ears, blood ringing as he heard moans and grunts of pleasure. One he recognized, the other he did't, yet it was distinctively female. He continued his way to the door, opening it and felt his heart shatter.

Dean and his ex-girlfriend Cassie Robinson in his bed, Dean thrusting into her sweetly and gentle. A way Dean had never done before, only when he needed something. His sobs escaped his lips, even when he wanted to leave without them knowing. Cassie turned towards the sound, eyes widening in terror as they landed on Castiel. She pushed Dean off of her, trying to untangle herself from the sheets. Castiel, heart broken, fled the room, running as fast as he could.

After running for 15 minutes, he finally made it to his destination. Looking at the house, smiling sadly as tears ran down his face, he walked to the front door, knocking softly. The owner must have been close, opening the door, Gabriel smiled when he saw his little brother. The smile dropped, concerned as he saw Castiel's tears.

"Cas what's wrong?" Gabriel asked, pulling him into the house. He lead the sable-haired man towards the sofa, watching as his husband came into the room. Sam sat on the other side of his brother-in-law, rubbing his back gently.

"Cas, we can't help if you don't tell us." Sam said, concerned for his best friend.

"I-i-it's Dean." he choked out.

"What happened to my brother?" Sam asked worriedly, concerned as to why Dean would be the cause of Castiel's tears.

"H-h-h-he was in bed with ano-another woman." he choked out. "It was Cassie. They were having sex in our bed." His sobs grew louder, his emotions getting to him. He sobbed harder when he heard Sam swore, angry at what his brother had done to his best friend.

"It'll be okay Cas, I'll take you over there, we'll kick him out and we can pack up your stuff." Sam said, trying to reassure him.

Cas nodded, wiping his face. "I just want him out of the house."