Sandi was born to Molly French and Alexander French in Bridgeport. Her parents later broke up because Alexander couldn't deal with having a child. As a toddler, she lived in Sunset Valley with her mom Molly French, her mom's roommate, Fiona McIrish, and Fiona's teenage daughter River McIrish. She always wondered who her father was.
Her mom partied too much, and it upset the household. Her mom and Fiona fought about her wild parties she threw. This upset Sandi, and when she was a child she became a Coward, afraid her mom would take the anger out on her. She met Cole, a neighborhood kid who lived near the park. Cole let her talk about her life whenever she wanted.
Her friend Cole were soon best friends. Sandi loved him a lot and had a crush, and then it led to their dating. She grew out of her sloppy habits and became a hard-worker in school.
Cole and Sandi later got married, and she moved in with Cole and his mom. She got a job as a babysitter because she loves kids and eventually, she had her son Payton Reed (same year her nephew-in-law Isaac was born). Payton was shy but friendly kid, but due to bullying in childhood he became a goth which sort of upset Sandi so she asked him about the bullies and he told her everything, so Sandi took care of them by telling the parents of the bullies. The bullying died down and Payton became happy again.
She and Payton took a trip to Bridgeport. The middle-aged man in the hotel room next to them was named Alexander French, Sandi's father. Sandi nor Payton didn't recognize him. He told them he once had a girlfriend he was deeply in love with, until she got pregnant and he wanted nothing to do with her because he wasn't ready to be a father. Sandi then said that's the story her single mom, Molly French told her about her dad she never new. Then Alexander realized... Sandi was his daughter and took off without a single word. This was the only time she had ever spoken to her grandfather...
Payton later moved away with his love Marissa to an unknown town and they had a son named Delstun.