Does this mean she’s single?
Nah, she is fine and so is her hubby.
Merely rumors thrown around, repeated and amplified by a variety of news agregators. Funnily enough mostly from NAFOids.
Anyway, could have happened, would have even made things easier for everybody. His family (wife and kids) is basically irrelevant, being safe is unlikely to have any future impact; unless his kids decide to go on a full "I'll avenge my father!!!" quest. Which is unlikely. Having them killed... heh... some would feel good about it I suppose, but ultimately that would have been gratuitous, imho.
Cancelling Assad's membership to the living-club would have, yes, made things easier and possibly better. Assad regime is over in Syria and it isn't coming back, but with Assad dead any chance of revival would be like pouring cement on that tomb, plus that would burry his "legacy" along with, to some extent, bringing closure to the Syrian people. The Tyrant is dead, over and done.
Was probably a mistake on Russia's part not to do it, plus they could have played the plausible deniability card "we didn't know it was him" or pinning the blame on someone else (perhaps the rebels would have been happy to get credited for it), but that also probably was part of the whole deal brokered about the, relatively peaceful, collapse of Syria.