[quote=@Lexisheeps]
[@Days]

And I imagine Theo, in particular, would have animosity towards Nick in the process. (In DB at least) Kinda like he feels that he wasn't good enough for Thierry then replaced.

I don't think Nick would hate Theo for this, but would definitely be jealous and desire to keep Thierry around to the best of his ability. 
[/quote]

Oh a 100%. Theo is Thierry's only son, and basically the same age as Nick, yet would feel incredibly replaced. Especially if all Theo did in his younger years was trying to get in his father's attention by for example asking about his work, be curious about his work, wanting to be involved in his work etc, only for him to turn around and have those convo's about about work etc with Nick. 

Aurélie is too protective over both of her siblings to let it slide, most likely.