When Abi Vance started dating her now husband Chris Vance, she had no clue what a huge part his ex-girlfriend Erin Harvey-Corner would play in her life.

The women just tolerated each other when they first met in 2016, but four years later, after being thrown together by the pandemic, they became friends.

By the time Erin was diagnosed with a rare cancer in 2023 the pair were as close as sisters.

“Chris and…