Spoilers for lady midnight!

(Jaces proposal to clary)

If you put together this clip⬆⬆⬆ with the second one("I haven't told anybody but you... "), it would seem like clary is telling emma a secret.
I think the secret has to do with clace babies, maybe that's Clary's secret! That's why she is so nervous and hasn't told anyone but emma.

And about the first picture,

"... And you'll find out from clary what's going on... "
Clace kids!!!!! I really have faith in this theory!
Clary may say no to the proposal for the reasons above, or because of this theory!!!

What do you guys think?

*crosses fingers*
I REALLY hope that's the case!!