the novel I am looking for, I believe takes place around 17 or 1800's. A young girl goes to Russia to become a governess or tutor a child to a wealthy widowed man (I think) she has beautiful green eyes and the head of household fall in love with her. I think his name was Dimitri and her name might have been Amaryllis. There is a sequel where her younger sister Sophie ( I think) arrives and also meets and marries a rich russian gentleman. If you know what book I am referring to please let me know title or author. thanks!