A weak, timid sister-in-law, unable to resist the stimulation of her clitoris while going to bed, experiences spasmodic orgasms. (NHDTB-777)

From her younger brother-in-law, who secretly admires her, to her sister-in-law, who is pranked while sleeping. Although she notices someone sneaking into the bed, she can't open her eyes... Her breasts are rubbed, her clitoris is teased, and she experiences silent, spasmodic orgasms. Her brother-in-law becomes addicted and loses control. He rubs his erect penis against her, makes her suck it, and eventually even engages in forbidden sexual acts...