Love pentagram - SPOILERS
As opposed to the typical love triangle in movies, I see this movie as a love pentagram. There are five main charachters who all want (or in one case need) something. They all get what they seek, but nobody is really happy in the end. The two voices of reason are left standing on the curb in disbelief.
I see the five main charachters as Georgie, Meredith, Jos, the milionaire and the infant Sarah. The millionaire wants Georgie, Georgie wants Sarah and Sarah needs a stable home. Meredith and Jos think they want one another, but they really want freedom from responsibility.
All five are connected whether they want to be or not.
Georgie: roommate and would-be savior of Meredith, in love with Jos, millionaire's obsession and eventually wife, and most of all has a deep yearning to become a mother that leads her to marrying the millionaire to keep Sarah.
Meredith: wife of Jos, mother of Sarah, roommate of Georgie, and birthmother to child adopted by Georgie and millionaire.
Jos: willing lover and reluctant husband to Meredith, lover to Georgie, father of Sarah, and birthfather to child adopted by Georgie and millionaire.
Millionaire: a suitor and husband to Georgie, reluctant adoptive father to Sarah, whose birthparents are Jos and Meredith.
Sarah: birthchild of Jos and Meredith, greatly loved by Georgie, who reluctantly marries the millionaire to keep her, adopted child of Georgie and millionaire.
Everybody gets what they seek/need, but not really. Georgie gets Sarah, although she had to marry the millionaire to get her. The aging millionaire gets Georgie, but reluctantly becomes a new father to do it. Childlike Jos and calculating Meredith flee easily from responsibility, but what will it cost them emotionally down the road? Jos turns to silliness to cover up the pain, but that is temporary. In the final scene, even Sarah who suddenly has a silver spoon in her mouth and an adoptive mother who deeply loves her, cries in unhappiness, perhaps from all the hoopla surrounding her after the wedding.
The voices of reason are Georgie's father and the health worker, who are left curbside in silence as the newlyweds drive off.
just some thoughts