Back when they were younger, they were the "it"-couple.
Nah, I kid. Vincent wouldn't allow such attention. He'd have himself a hissy fit. I don't think Bailei would mind though, I think she'd be like "Oh you guys~ You're so nice!" :'D
But yes, to answer any questions, Vincent's cold, decrepit, blackened heart does warm for Bailei. He really does love her.