"Candles on Bay Street" (2006 TV movie)
From IMDb: DeeDee returns to her hometown with her 11-year-old son, Trooper, 13 years after she ran off with her boyfriend. Her childhood best friend, Sam, is now married, and he and his wife, Lydia, are the town's veterinarians. ... DeeDee and Trooper find their way into many hearts of the townspeople with their sweet helpfulness and friendships. DeeDee sets up a candle-making business in town square and invites many of the ladies of the town to weekly candle-making parties; through these parties, she and Lydia become good friends. One evening after dinner with Lydia and Sam, DeeDee tells Sam she's very sick and doesn't have much longer to live; she says that she needs his help to find a good family in town to adopt Trooper. Sam later tells Lydia everything, and they decide to adopt Trooper themselves if/when something happens to DeeDee.