One the one hand, I really get where Daphne is coming from. Growing up with something different, watching someone come to the conclusion that different = abort, she may truly wonder if Toby / society sees HER as having less worth. I didn't love the way Regina answered her, either, which may be where it all stems from.
As a special needs parent, I'm VERY honest with my son that YES, his/our life is harder in some ways. Why would I lie about that? There's more to figure out, and it's harder, and sometime's it sucks - for him, for me, for the rest of the family. But that doesn't mean it's not worth it - HE'S not worth it. We're all willing and wanting to work harder because it means we get HIM. Regina almost made it there with her "you make our lives richer" but clearly Daphne is not confident about it.
But that doesn't give her the right/place to try to sway Toby. If she had just said "this is how that makes me feel", that would be giving him information to process as he will, but as it was, she was really trying to push him away from his decision.
Meantime, with Toby and Lily's discussion, I was waiting for there to be a big misunderstanding about abortion vs. adoption, because neither of them spoke the word. I sort of wish that had been in the conversation as an option. She's far enough along (probably end of first trimester? Given she's been dealing with it for "weeks" and already had testing done and results back) that getting an abortion will be both harder to get and a more involved procedure, so it seems almost odd that adoption isn't brought up as an option at all, even if it was just in passing.