I think it would be hard not to keep an eye out when you know she will be there. Like swimmy mentioned; some T's have various policies about how they respond to clients outside of session - I'm not sure if yours mentioned that or not; but if it happens just be aware it's meant to be for your benefit. Other T's have more relaxed policies; it may also depend on your country/state though.

That she told you she would be there is nice