Luis began thrusting his hips, treating her little mouth as if it were her pussy.
This was the first time Nancy had ever felt so passive.
That sense of powerless submission made her cooperate obediently with her brother-in-law, tightly enveloping the rigid member in her mouth.
"This is amazing, big sister, your mouth feels so good."
Luis let out a beast-like, hoarse growl, his movements growing faster, though he dared not thrust too deep. But then Nancy's small hand gently caressed the man's stiff, twitching testicles.
The fairy-like, enchanting sister-in-law's mouth was being fucked, drawing out uncontrollable moans and whimpers. Saliva dripped down her chin, some even splashing onto her breasts.
This stimulation was immense for Luis. He could no longer hold back, roaring hoarsely, "I'm coming, big sister, keep it tight."
