[quote=@Lexisheeps]
I'm thinking no more than a year or two? I'm thinking Thierry has at least 3 kids, any more than that and I feel like I'd be pushing it timeline wise.
[/quote] 
So, Nick 16, Cosette 16/17, middle child 17/18/19, oldest 19/20



[quote=@Lexisheeps]
OR. If White did want Sabrina to be younger, 1 of his kids can be from a previous unmarried relationship.
[/quote]
I'm fine with my character (the oldest) being from a previous [s]marriage[/s] situationship, too. For context, she is going to be the one to make Thierry's life difficult, but she has high affection for her siblings, especially Cosette.