But that would be pseudoincest....
Huh..? Are you serious?
what are you on about
If mc and ml get married and ml had a brother that got with mc's brother then that would be brother in law x brother in law, that's literally pseudoincest
pseudoincest (uncountable)
Sexual involvement between family members who are not blood relations (e.g., siblings by adoption, stepparents and stepchildren, in-laws)
Hawt . and what if the ml has a brother, the brother of the mc and ml can be the side couple ╮(￣▽￣)╭ (guys don't come at me this is just my what if)