This is a rather crucial piece of information: is this their first separation? Maybe the paperwork is in order and you see it’s a permanent separation. But if a little extra digging reveals that they have separated, reconciled, separated again, reconciled again, and so on, many times, you may want to steer clear of this situation. You don’t really have reason to believe that this will be the final off in this on/again, off/again situation. Those relationships are messy and unpredictable. Maybe take a step back and make sure this separation actually sticks before engaging. You don’t want to be the collateral in this dangerous dance.