Isabella did well

When she was gone, you turned your attention to Emma and hugged her before pushing her away far enough to see her face and asking, "was it everything you wanted?"

She looked pensive for a moment before admitting, "I kind of hoped she'd have some crazy cougar tricks to teach us," she turned to Lily and giggled, "I guess we had more to teach her."

Lily laughed in response and admitted, "it was pretty hot, though."

You turned to Isabella, "you were very good with Heather. She seemed to really... appreciate it."

She beamed with pride.

After thinking about it for a moment, you continued, "that was above and beyond," you looked her in the eye and said firmly, "you deserve a reward."

Her eyes opened wide as you informed her, "you can have anything you want." Her breathing got faster as she considered the possibilities. After giving her a moment to think, you asked, "what do you want? Anything."

Her eyes darted between the three of you and she eventually managed to pant out, "all of you..." her eyes darted to Lily and back to you before she concluded, "tongues."

You quickly guided Isabella to a bed with Emma and Lily close behind. You instructed her to lay down and took a moment to look down at her, spread-eagled below you.

But you didn't pause for long, you had a promise to keep. You climbed between her outstretched legs and crawled toward her glistening slit. As you did, Lily appeared on one side of Isabella and wrapped her lips around her nipple. Emma appeared on the other side and to your surprise, jammed her tongue in Isabella's mouth.

As you brought your tongue to her clit, her moan was muffled by Emma's mouth.

After you made her cum, Lily squeezed in beside you. You watched her start to lick Isabella before you took her place playing with her tits. Emma joined you, happily licking her other nipple.

Once Lily had taken her turn, Emma slid down between Isabella's legs. You looked down happily as she started to lick. As you did, it started to feel like a long time since you'd gotten off. You smiled at Isabella, and guessed she would forgive the loss of one tongue.

You climbed behind Emma and lifted her hips off the bed. She wiggled her hips up, giving you exactly the target you wanted. Both she and Isabella moaned as your cock slid into her pussy.

You tried your best to let Emma keep concentrating on Isabella, but her pussy felt just too good for you to be too gentle. As you fucked her, her tongue stayed mostly on Isabella's clit, and was only occasionally sent off course by a particularly vigorous thrust.

As Lily watched all of this, it was clear she wasn't going to be left out for long. You saw her make eye contact with Isabella. Somehow a telepathic question was asked and Isabella nodded.

Lily stepped across Isabella's body and straddled her face. You almost came just watching her lower herself onto Isabella's outstretched tongue.

You knew you couldn't watch the three girls in front of you for very long. Luckily, Isabella was very experienced at licking Lily, and she started to cum quickly.

When she did, you slowed your pace, and let Emma concentrate on Isabella's clit long enough for her to reach her goal.

With that done, you pushed your cock deep and hard into Emma, making sure all four of you came together.

Once everyone was fully, completely done, the four of you untangled yourselves. Isabella looked a little stunned that she had been in the middle of all of that action.

In a few minutes, she regained her senses and jumped between Emma's legs and happily slurped your load out of her.

The next day, you worried about Isabella getting too comfortable.

You instructed her to lick Lily's clit while you fucked her. You made sure to position yourself so it was almost impossible to fulfill your request. Each thrust into Lily slammed your hips against Isabella's face, but she was completely dedicated to your command and did everything she could to keep her tongue on Lily.

Finishing by pulling out of Lily and covering Isabella's face with cum seemed to make all three of you happy.