A Very Merry Daughter of the Bride (2008) on Netflix

Plot summary

Roxanne runs a wedding planning business with her mother, Rose, and minds it alone while Rose spends three days in France. During that time Dylan, her fiancé from six years earlier, reappears; he had called off their wedding and vanished, and now he wants to catch up. She turns him down because her mother is due home that day. Rose returns with Jack, a man who proposed after two days, and the two plan a Christmas wedding. Roxanne objects and finds an ally in Charlie, Jack's son from an earlier marriage. Together they set out to stop the wedding, and Roxanne talks the couple into delaying it.