Blow job

"Well...I guess you could suck on it," you say.

"Even when you're sacrificing for me, you're still a guy," she grumbled as she dropped to her knees in front of you.

Looking down at her, you suddenly saw Marcie in a different light. She had always been your sister, but as she knelt naked in front of you, for the first time you realized how beautiful a woman she was. Just looking down at her, you felt you cock start to stiffen...

Before you could say anything else, she grabbed the shaft of your limp cock and wrapped her lips around it. She wasn't the first girl to suck your cock, but you knew instantly that she was the best and most experienced. Her tongue was doing things you had never felt before, while one hand teased your balls and the other squeezed the basebof your shaft.

"Holy fuck, Marcie!" you say.

Even as you rise to full attention, she doesn't struggle with having the full length of your big cock shoved down her throat. You had never wanted to cum inside someone's mouth more than you did in that moment, but that wasn't the deal. If you were going to help her become an Alpha, you had to fuck her.

But her mouth felt so good...