Though Emma may go all crazy on Regina if Henry is unconscious and seems to be dead from eating a poisoned apple. And it might push Emma over the edge into belief.
Now that! , Id pay to see lmao!!!!!!! 😉 :p
Seriously though I dont know if it’d work in SB but couldnt she wake him if she truly loved him ie -expressing true love itself for her child (rather than partner)? I dont know how exactly that would work since magic isnt meant to work here in all 😕 OR- just a wild thought- maybe she gets serious about leaving again & Henry passes out, she freaks out & Regina does something (probably involving something from under her creepy bat lair place), which Emma see’s & Henry wakes up after being told by Whale that he wont or something??? its a crazy idea but hey they made August pinno so, well, anything is possible 😉 :p