Marcie

Charlie jumped and quickly tried to shove his cock back into his shorts, but there was really little I could do to hide. I was on my knees with my father-in-law's cum running down my chin.

"Damn, dad," Marcie said, shaking her head. "Can't get enough of the new guy, huh?"

"It...uh...we were just..."

"Relax, I know about you and Sandra's little swinger routine," she said. She grabbed the attic ladder and pulled it up behind her. "And I heard you fucking Alan in the ass last night."

"You know?" he asked.

"Yeah, but relax, Kate and Jordan don't know," she said. "Sandra kinda spilled the story a while back when she was trying to recruit me into your little bisexual swingers game."

Charlie blushed.

Marcie looked at me on my knees and smiled. "He does good work on his knees, doesn't he?"

"You too?"

"Yeah, me too," she said with a giggle. "But I have ulterior motives. I'm trying to get him to knock me up."

"Really?!!!" he said with a smile. "I would love another grandkid."

"I was hoping to get a few minutes alone with him, before you drug him off to 'help' you."

"Well don't waist time, get to it," Charlie said. "Make me a grandbaby!"

"Are you gonna watch?"

"They might get curious if I show up without you."

Marcie unfastened her shorts and let them fall to the ground. She stood there for a moment, bare assed, staring at me with her hands on her hips. I saw her father's eyes drift down to her naked bottom before he made the visible effort to look away.

"What I really want is for you to lick my pussy until I cream all over your face, but we don't really have much time. Making a baby takes priority, so take your pants off and lay down on your back."

I did as I was instructed.