Quote Originally Posted by Lampada
Quote Originally Posted by net surfer
Since she started calling him ты, I think it's OK to ask.
Besides I think if you've been working/talking to a person for pretty long time and you feel you're equal, you can offer to switch to ты and it'll be OK.
It was fine for her to address him на "ты" and accept the fact that he addresses her на "вы". Their relationship is established for now and any change in addressing will change it.
It was fine for her, huh? What about him? Or she doesn't care?
In the first place, he's not that older than her and he's not that young so it's adult-kid relation and it's supposed to call him ты and her вы. In the second place, since she started calling him ты, she should have been ready to be called ты as well. If not, she's just an "uppity snob".
You know the rule - treat people the way you want to be treated by them.