By fucking her pussy.

“I feel I got one more in the tank. How would you like if I filled you up as a reward for all your hard work?” Tiffany proposes.

“It must be so tiring on your dick having to use your hand for all these hours. After all that your big sister’s pussy would feel like a refreshing dip,” teases Sophia as she walks over to the bed.

Sophie turns to sit on the bed. Still drenched in cum she falls back onto the bed and lets her legs dangle off the edge. Tiffany moves in and stands before Sophie. She crouches, pulls Sophie by her legs towards her, and slides her dick in. Tiffany pumps into Sophia rocking her bed with each thrust.

“Oohh, thank you Tiff! I’m so happy you felt like rewarding me!” Sophia moans.

Tiffany pumps leisurely at first. Sophie’s pussy feels warm and comfortable after a long day of jacking off. Tiff buries herself up to the base of her cock relishing the heavenly sensation of incestual intercourse. But soon enough she starts to feel weary. She picks up her pace. Tiffany thrusts hard and fast hoping to finish before she can’t go any longer. She leans onto the bed supporting her weight with her arms. Her climax is almost here.

Tiffany cums into Sophia. They moan greatly and Tiffany pants heavily. She lets herself fall onto Sophie too tired to move anymore. She wedges her head between Sophie’s tits not caring about getting smeared with jizz. They bask in the afterglow and Sophie savors the last of Tiff’s cum flowing profusely into her cunt. She pats Tiffany’s head and back as they rest for a little bit.

Eventually Sophia rolls Tiffany off her and gets up. She finally cleans herself and puts on her clothes.

“Well, it’s getting close to the time for Mom and Emi to come home. I better clean this place quick. Don’t worry about a thing Tiff, you can keep resting,” says Sophia.

“Okayyy,” says Tiff face down on her bed. She promptly starts to snore.

* * * * *

Some time later Tiffany wakes up. She touches her face and realizes she’s covered in the residue of her own cum. She quickly wipes it off with her bed cover and gets dressed in fresh clothes. She gathers up her filthy laundry and hurries to take it to the laundry room. She finds that her door was locked from her side and mentally thanks Sophia for her thoughtfulness.

When Tiff gets back, she sees how well Sophia had cleaned and straightened her room. Sophie did a great job cleaning up after their session, but Tiff notices that not everything is where it originally was. This begins to bug Tiffany, so she gets to work moving things back to their proper place.

From outside in the hall Tiffany hears, “Woooh! You smell Sophie!”

“Yeah. I know. I’m going to shower right now,” retorts Sophia.

“Today must have been a really fun day for you, huh?”

“Stop it Emi. You’re just imagining things,” Sophie snaps back. Then Tiff hears the bathroom door close and the shower start running.

As Tiffany is moving things around she sees Emelia walk past her door. Then Emelia comes back and enters.

“Damn, this place stinks too! Don’t you have any self-control, Tiff?!” Emelia asks.

“Get out of my room!” Tiffany barks quickly finding the air freshener and spraying it.

Emelia walks away to leave, but then pauses. She stands in the doorway for just a moment. Tiffany holds her breath watching Emelia for any reaction. She fears that she’s been too reckless again. That Em may be starting to sense that something is up. Emelia turns around and looks at Tiff.

“Hey Tiff, so Mom told me you might be seeing someone. Is that true?”

“…yeah, I’m seeing someone,” Tiff says still rearranging her room. She thinks about putting her skills to the test right now but worries that she won’t be able to muster the necessary material or desire.

“A girlfriend?”

“Yeah!...I got a girlfriend. What of it?”

“Lucky her,” Em mutters.

“So, when are we meeting her?” Emelia pesters.

“You’ll meet her when you’ll meet her, now leave me alone,” Tiff says shoving Em out of her room and closing the door.

Tiffany finishes fixing her room and Sophia finishes her shower just in time for bed. Everyone closes their door to retire for the night. Tiff gets into bed and sends a text to Sophie.

Tiffany: I’m taking Em tomorrow

Sophia: Ooo can’t wait!