[You can't just tell him that and then expect him not to ask!! But despite really wanting to ask he won't. He's not going to be getting any answers out of you anyway, from the sound of it.]

I'm sorry you're getting memories like that.

[The words are carefully chosen because he doesn't know exactly what Wesker's been experiencing. It has to be worse than what he's already told Jaeger though, which is troubling.]

I wish I could reassure you that everything will turn out fine, or at least offer you some sort of comforting words! But I'm afraid I don't have any right now.