That's not quite my view. If the "second boyfriend" relationship is one that normally comes with obligations like taking someone in temporarily, then that secon

That's not quite my view. If the "second boyfriend" relationship is one that normally comes with obligations like taking someone in temporarily, then that second boyfriend is more obligated than other parties. If the other guy is just a NSA hookup, then he's definitely not obligated - such a relationship establishes no such obligation. (I'm not very familiar with the "second boyfriend" relationship, having never actually taken on that role.)