The Next Best Thing (2000)

Abbie Reynolds is a Los Angeles yoga instructor who is approaching 40 and has been burned by too many past relationships. Robbie Whitaker is a gay, aging Hollywood playboy who works as a gardener and has become Abbie's best friend. Their relationship takes a different turn when, after the funeral of a mutual friend who has died of AIDS, Abbie and Robbie get rip-roaring drunk and end up in bed together. Now that Abbie is pregnant and Robbie is still gay, the two decide to live together and form a happy family for the unborn Sam. However trouble arises when, six years later, Abbie falls in love with New York investment banker Ben and Robbie is forced to fight them for custody of Sam.