Are u make sure she is really pregnancy. Does she want to cheat your money. I had an experience that my maid tell me that she was pregnancy and requested to return to Phili as soon as possible. My husband requested her to see doctor first. At last, she was found to be not pregnancy. She claimed that she just scared of she was pregnancy at last.
Of course, u need to guess whether she is really pregnancy before u plan to negotiate with her.