About 30-50 years old starring jane seymour ,was in a war setting about three little girls in a boarding high school one becomes pregnant and they vow to never tell who had the baby and when the baby got older she went looking for them one by one and found them and made them tell her which one was her mother (a line from the movie) which one of you *****es is my mother

Lace (http://www.imdb.com/title/tt0087583/)

The movie is Lace, Jane Seymour is not in it. Stars are Phoebe Cates, Beth Armstrong, Brooke Adams. Phoebe Cates plays the daughter and Beth Armstrong is her mother.