Sasuke and Itachi have a interesting relationship. Infront of people they acted like the perfect siblings, but in the comforts of their own bedroom their relationship is taken to a sexual state.
Currently Sasuke was fucking Itachi from behind as she shoved her face in the pillow an a attempt to muffle her moans and whimpers. Sasuke himself was biting his lip to stop his groans from coming out as he smacked Itachi's ass to which it jiggled greatly.
Sasuke loves all parts of his dear older sister, but his favorite part is her breasts. He loves the way they bounce and her whimpers whenever he kneads them in his hands.
Itachi tightened around Sasuke which he took as a sign that she was close, which urged him as well to finish so he upped his speed of his thrusts which caused a loud moan that not even the pillow could muffle. Thankfully their parents were out, however since they were in Sasuke's room on the first floor they had to keep quiet incase other family members went to investigate the noise and find them in bed together.
Itachi drenched Sasuke's cock as she came which made Sasuke blow his load deep inside her. They fell back on the bed exhausted as Itachi layed on Sasuke with her head on his chest as they both had smiles on their face.
Sasuke had a fascination with Itachi's Anbu tattoo despite having one himself, he has always enjoyed biting down on that part as it seemed particularly sensitive.
Their Sharingans stared at each other with hunger in their eyes. This time Itachi was on top as she rode him with a nice flush to her face that Sasuke's Sharingan kept in memory as Sasuke spanked her which caused her to tighten for a second. All activities halted when they heard the front door open which began a series of action that was Sasuke rushing up and getting dressed with the same thing with Itachi but she went through the window and climbed up towards her room.
*****
Their parents arrived home early but they successfully did not get caught. Thankfully Itachi took a shower once she realized that cum was running down her leg to which she cleaned up and wore a high neck shirt an a attempt to cover her hickeys while their parents thought that Sasuke just went out and slept with someone.
They hope that they never find out their secret otherwise their parents would disown them. They have been making plans of possibly running away somewhere so they can be in public and get married and they have settled on the Village Hidden in the Snow as those people were generally introverted by nature.
That is their plan and the story of Sasuke and Itachi Uchiha.