Then She Found Me (2007) on Netflix

39-year-old April Epner's childish husband and school teacher colleague Benjamin/Ben leaves her, but with her biological clock ticking ever more loudly. Her dying bossy adoptive mother is very vocal about her disappointment, while her natural son Freddy, a doctor, is most understanding. Shy but fascinating British author Frank meets April, his doted son Jimmy Ray's teacher, which soon leads to a full-flung affair. At the same time April's birth mother Bernice Graves locates her and begins attempting to establish a relationship. On top of all these balls in the air, April discovers she's finally expecting Ben's baby.