I'M NOT GOOD WITH MATH. Just needed to say this first and foremost. '>>

BUT
Yes, Nick is younger than all of Thierry's biological children. 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.

OR. If White did want Sabrina to be younger, 1 of his kids can be from a previous unmarried relationship.