Quote:
Longman - Dictionary of Contemporary English
incest, n. [U] a forbidden sexual relationship between close relatives in a family, e.g. between brother and sister or parent and child
|
You don't think masturbating while thinking of the person makes it a sexual relationship? It's certainly a step further than the "normal" brother sister relationship.
The show doesn't show us an incestual relationship but it certainly is about incest. That's exactly what was on his mind while he was cleaning the pipes.