I'd like to ask about the morality of homewrecking: if two people, say B and J, are married, is there anything wrong with a third person, A, actively pursuing B?
It seems to me that A could say: it takes two to tango; everyone has a right to maximise their happiness; one should respect B's autonomy; and I'm not responsible for the consequences of B's actions.
J could reply: but you cause foreseeable suffering by your actions. To which A could respond: I think autonomy and the morality of what actions are permitted should trump the morality of thinking about consequences, but even when applying the morality of consequences: if B stays, then both he and I will be unhappy; if B goes, then it is only you who are unhappy.
What do you think? Is homewrecking clearly morally wrong?