Amy called asking for help

The girls were into their final month of pregnancy. Sex with my now very ripe new wife had continued to be wild and kinky. Clearly the hormones did good things to her. The closer we got to the due date, the more she was into anal and the less I got to be in her pussy as she was afraid it would kick start labor.

We had actually just finished and were trying to catch our breath when the phone rang, which was a bit surprising at almost midnight. I answered quickly, worried.

"Alan, its Amy," the voice on the other end of the line said. "Nothing is wrong, but your brother is at work and I was hoping you could come help me with something."

"It can't wait until the morning?" I asked.

"Well...not really," she said.

I covered the phone and leaned towards Kate, who was now laying on her side, still naked, with her ass facing me. A trail of cum had leaked out and was running down her left butt cheek.

"Amy needs help with something," I said.

"Go on," Kate said sleepily. "I am through with you for the night."

"Okay, I'll be right there," I said.

Without bothering to wash up after my anal exploits with my wife, I pulled on a pair of shorts and a t-shirt and slipped out of our apartment, walking immediately next door. When there was no answer to my knock, I let myself in.

Their apartment was identical to ours...of course with slightly different furniture.

"Amy?" I caller out.

"Back here," she said from the bedroom.

I walked through the house and pushed open the bedroom door and for a moment stared into darkeness.

"Hello?" I asked.

"Turn on the light, silly."

I flicked on the light switch, only to find my sister-in-law laying naked in the bed, her knees pulled up and spread so that her shaved pussy was aimed directly at me. Like Kate, her belly was swollen in the final month of pregnancy.

"What the hell?" I asked.

"I need your help," she said, motioning for me to come closer.

Before Kate, I never really looked twice at a pregnant woman, but since...I had kinda developed a bit of a preggo fetish. I couldnt help but stare as i approached the bed, and I could myself getting hard.

"What is wrong?" I asked again as I reached her.

Suddenly she grabs my hand and pulls me down to her, kissing me. I was suddenly that same kid who she had kissed years ago and she had complete control. Her hand slipped down to my crotch and started to rub my hard cock through my shorts.

"I have been horny for a week and your brother is afraid to touch me," she said after breaking the kiss. "I could hear you and Kate going at it...for the last two hours. I need you to help me out."

Before I can protest, she yanks my shorts down, freeing my cock.