The protagonist's parents were closely related to each other, genetically. Check the related Wikipedia page for details.
| Name | Similarity |
|---|---|
| Inbred Role | 54% |
| Inbreeding Engages in (Sexual) | 35% |
| Incest Engages in (Sexual) | 29% |
| Half-sister Role | 26% |
| Son Role | 25% |
| Mother Role | 25% |
| Doggy Style Engages in (Sexual) | 23% |
| Footjob Subject of (Sexual) | 23% |
| Blowjob Subject of (Sexual) | 22% |
| Handjob Subject of (Sexual) | 22% |
| Half-brother Role | 22% |
| Daughter Role | 22% |
| Older Sister Role | 21% |
| Older Brother Role | 20% |
| Younger Sister Role | 20% |
| Boobjob Subject of (Sexual) | 20% |
| Anal Sex Engages in (Sexual) | 19% |
| Full Brother Role | 19% |
| Doggy Style Subject of (Sexual) | 19% |
| Apron Clothes | 18% |