Daddy gave them a very simple assignment for that evening. His friends were coming over to watch the basketball game on their big TV. Jenny and Tammy had to go to the store in their tightest half-tees and sexy shorts and load up on snacks for the gang. They had plenty of fans as they strolled around the supermarket, and once they checked out, the boy pushing their cart looked like he might have a stroke any second.
After he loaded the groceries into Jenny's car, she put her arms over his shoulders and gave him a tit-squeezing kiss, then said, "Thanks, sweetie!" He looked ready to pass out. They laughed as Jenny pulled out of the parking lot.
"Wow, that was fun!" Tammy declared, and Jenny nodded her agreement.
"I don't think I ever got horny just walking around the grocery store before."
Tammy laughed. "You too? Gawd I feel like I need to do something about it!"
Jenny teased her, "Why don't you?"
The younger sister stuck out her tongue, then glanced out the window at the rapidly darkening evening. Then she grinned and started massaging her tits, so that her nipples were soon clearly standing out through the tight fabric of her shirt.
Jenny smiled impishly when she came to a stoplight and put the car in park so that she could slip off her shorts, exposing her hairless pussy. She shifted back to drive and pulled out as the light turned green, then started fingering herself as she drove.
Tammy gave her a sultry smile and wiggled out of her own shorts. She started her own pussy fingering, then said, "Daddy wants us to fuck any guy or girl we get a chance to, right?"
"That's right, sis," Jenny answered, With a giggle, Tammy then lay down and snaked her head into Jenny's lap, twisting so she could get her mouth down between her sister's thighs.
Jenny gave a warm, approving sound as she felt her sisters tongue dancing on her clit and lips, and she decided to use her now idle hand to slip Tammy's tits out from beneath her tee so she could fondle them. Tammy's own hand continued to work between her own legs, now vigorously fucking herself as she made love to her elder sister.
She was starting to have trouble keeping her eye on the road, so Jenny finally pulled into the rear parking lot of a strip mall and turned the car off. She crawled over Tammy to find the lever to lean the passenger side seat back, then shifted over to it as Tammy leaned back. Soon they were 69ing in Tammy's seat, Jenny's legs hanging over the back of the seat while Tammy ate her. As first she only fingered Tammy's young pussy, but finally she lowered her head and began sucking and licking her pussy lips as she rubbed her clit.
She was eating her own sister's pussy! It was her first sex as Daddy's new slut, and it was as already as dirty as she could imagine... although she couldn't help thinking about Daddy's cock when Tammy began pushing fingers into her. This is when she decided to fuck as many people as she possible could for Daddy, so he would make love to her many, many times.
Tammy began bucking wildly underneath her, letting out an ecstatic cry when she came. Then she made Jenny get off, so she could kneel in the floorboard and Jenny could lay down normally. Then the younger sister finished her with loving passion, bringing her to her own shuddering rapture.
Jenny smiled down at her sister licking her pussy gently, playing with her hair as she enjoyed the last glows of pleasure. "You've done that before! I bet you've done it a lot, haven't you?"
The younger sister giggled and asked, "How can you tell?"
"A little tongue told me," she smirked. Tammy climbed up her body and gave her a long, deep kiss.
Jenny got back in her seat, pulled just her top back on and started the motor, but Tammy decided just to skootch down in her seat. Ten minutes later, they pulled into the garage nicely warmed up for the evening.