Look at me, i exist

Some what of an alternative universe where emma swan has twins but decides to keep one of them, her daughter Matilda
When her other child shows up on her doorstep and they uproot their life to storybrooke tilly starts to feel lost, her mother favouring her long lost brother spending time with him more and more she finds herself drawn to Henrys other mother regina.
With henry now spending more and more and more time with emma regina starts to get jealous and begins spending time with matilda and they form a close bond
What will happen when emma finds out

All characters belong to once upon a time on disney plus bar Matilda who is a character i came up with