#sibling

A high school schemer dating one sister to get closer to the other ends up in compromising situations with both.

Harry Potter imagines a twin sister, Lucy, who becomes real and devotes herself entirely to him at Hogwarts.

A stepbrother's encounter with his attractive step sister begins when she catches him masturbating and later brushes against him in the hallway.

A brother and sister explore their romantic and sexual feelings for each other while keeping their relationship a secret from their parents.

A shapeshifting teen spends the morning with his sister and plans to shift into a female form for the day, with shifting and sibling intimacy central to the story.

A sister confesses her love to her brother and proposes they become a real couple, transitioning from casual sex to a full relationship.

An older man begins writing his autobiography, recounting his teenage sexual awakening with his older sister and the wild party that led to losing his virginity.

A 17-year-old boy fixates on his sister amid a large blended family of step-siblings and adopted siblings, exploring forbidden attraction from the start of senior year.

Two siblings discover their relationship when caught by parents, who then reveal they are also brother and sister.

A man comforts his casual lover in the bath, where she reveals her wish for a second impregnation.

A man forces his intoxicated younger sister-in-law into increasingly aggressive oral sex while awaiting his lover's arrival.

A sister and brother secretly continue their relationship, resulting in a pregnancy and a surprise proposal.

A teenage narrator recounts his ongoing sexual escapades with his sister while their parents grow increasingly suspicious.

A brother and sister engage in passionate sex around their parents' home while planning their forbidden wedding.

A brother and sister grow closer than expected during a cold night in a camping tent, leading to mutual sexual exploration.

A younger brother discovers his older sister's late-night romantic messages and begins collecting them for leverage.

An insecure teen boy discovers his body mysteriously shifts after dreaming about his attractive younger sister.

A young woman confides her crush on her older brother after accidentally walking in on her friend's taboo encounter with her own sibling.

A domineering college freshman, previously serviced by his stepbrother, targets his straight dormmate as his next personal bitch boy.

A brother and sister consummate their forbidden attraction with tender, first-time lovemaking.