Caught by a member of your new family

As you and your mom pick up your clothes, and attempt to get dressed, a petite looking girl with straight black hair walks in on you. She's dressed in a very tight pair of shorts, and rather tight fitting tank top as well. "Look who we have here, all naked" she says with a wry smile. "My new mother, and my new sister, I presume? Please don't get dressed on my account. In fact, keep your clothes off. I'm going to take mine off, and let the two of you pleasure me."

Your mother looks exasperated as she drops her clothes on the floor. "Hello Kim. I was not intending for us to meet like this."

"Apparently not" says Kim as she strips off her tank top, exposing her bare B cup breasts. They may be small, but they're cute and perky. "Looks like I have myself two sex slaves instead of a mommy and a sister. Wouldn't you say?" She unzips her shorts, and shimmies out of them. "You wouldn't want daddy to know just how perverted you two are, would you?"

"You saw everything?" asks your mom.

"Oh yes!" exclaims Kim. "Mother and daughter bonding looks like so much fun the way you two handle it." She slides her lilac panties down her legs, and steps out of them. "Now let's do some mother-daughter bonding of our own. Mommy dearest, you can lick my dirty cunt while my new sister works on my nipples. Now, do I have your cooperation? Or will daddy have to find out his new wife's dirty little secret?"

Your mother looks at you in dismay. It's clear she knows Kim, and that Kim knows her. "Don't ask" she says, looking you straight in the eyes. "Just do as you're told."