You might want to check out 'Bible Black'. It offers a somewhat complex story within the adult anime genre. But be aware that this kind of anime is targeted at a specific audience and may not be everyone's cup of tea.
Such a comic is definitely not something positive or acceptable. It's likely filled with unethical and potentially harmful material related to family in an inappropriate way.
Family Guy was an American animated comedy directed by Seth McFarland. The main storyline of the cartoon was based on a family living in the fictional City of Clam, Rhode Island, USA. Through the use of flashbacks, each episode revolved around Peter Griffin and his family. The work performed well in similar animated films, but there were some shortcomings, such as plagiarism and wanton references to other animated films, as well as excessive use of flashback plots. Family Guy had been on air for 22 seasons and had been nominated for eight Emmy Awards, winning three awards.
Well, it could be a result of jealousy, revenge, or maybe he was forced into it by external circumstances. Without more details, it's hard to say exactly.