lucy doesn't often get involved in serious relationships since she struggles to get attached, and her last relationship was before her daughter was born so she's been hesitant to get deeply involved with anyone. she would have been a nervous wreck as well tbh so maybe that's where they ended up bonding? like, they both kept doing dumb, embarrassing things stemming from nerves and it devolved into laughter and chaos and the realization that a friendship was probably for the best?