Thank you for your replies. Well she assures me that everything is ok and that she likes working for me. Her room is not as spacious as the one she had before but she was aware before she arrived that space would be an issue - the apartment here is half the size of our Singapore one - she was in HK for many years before Singapore. Her workload is less as the place is so much smaller! I doubt she's looking for other employment.
Since our chat she seems to have perked up a bit - maybe she just needed me to say something....
Thank you all again for your thoughts