I think when you tell people to not do the thing that brings them some form of delight, you'd always look like the enemy at first glance. I'm sorry that your sister shut you off that way. She clearly didn't know better.
I think its okay to still ask about her well-being, though. In as much as she may have being rude earlier, your concern could actually mean a lot to her. I wish both of you the best together.
Ofcourse, I want the best for her and I always ask about her wellbeing too