To clarify - your L is just your L, I don't think you need to try to make your L the bad guy at this point. Especially b/c it's your father - what if you reconciled but your H still thought your father was "the bad guy?"
Even if it's not "true strategy" I would be very wary of using language like "My L advised me . . . " because to me it comes across as "This is how I want to get a dig at you but I'm disguising it as coming from my L." It still creates ill will toward your "side."
