Just One Time

A couple (already living together) is about to get married. Hubby to be wants to have his fantasy (in bed with two women) "just one time" before they tie the knot. Bride isn't so keen on that. But she say's OK if he would do the same and you can figure out the rest of the basic plot. Her choice is a young gay neighbor. It doesn't play out exactly as it's heading but I don't want to give away the whole plot. The acting is good, the characters reasonably filled out, and the plot more or less believeable is you are willing to buy into a few minor things.