"I'm really sorry to hear about that, but I hope you're able to work out a deal that's fair to everyone."
That's my suggestion, anyway. If you want to get nosy, you could say "I thought you guys were so happy. What happened?" I wouldn't recommend that, however, unless you're close to your sister. I'm sure you'll find out the whole story sooner or later anyway.
That's my suggestion, anyway. If you want to get nosy, you could say "I thought you guys were so happy. What happened?" I wouldn't recommend that, however, unless you're close to your sister. I'm sure you'll find out the whole story sooner or later anyway.