If you engage in an incestuous relationship with a family member, that would make you an inbreeder.
An incestuous community of expatriates.
When two people who grew up together and who were always overly close begin a love affair that seems inappropriate, this is an example of an incestuous relationship.
When two siblings have a sexual relationship, this is an example of an incestuous relationship.
Origin of incestuous
- incest + -ous