Predictions on what they did after the film ended.... [spoilers]
Okay, let's give our own predictions on where they were by 1997. Five years in the future...
-Roger and Mary stay together, and gradually get over the loss of their son even as their living child grows up in full health
-Maggie moves in with Peter to help him with his HIV, and they maintain a good friendship
-Andrew divorces Carol and hooks up with Sarah again, working on the unfinished play with Peter.