YA Fantasy book. Twins share a body and can switch from the brother's body to the sister's body through magic. Read 2013-2015. Spoilers ahead.

[Callum]

I listened to this story as an audiobook at some point between 2013 and 2015 but didn’t get the chance to finish it. I know this isn’t much detail wise but I hope the pretty unique main element will jog someone’s memory.
Thank you for any support on this!

The book was centred around twin siblings who can swap places with one another physically while both existing consciously, this is kept secret and considered taboo.
I believe the protagonists are late teens.


The specifics I remember aren’t many but SPOILERS AHEAD


There is a point in the book where they see a magic show and the magician can tell they are two people in one body, he used his magic to swap the sister for the brother but played it off as part of his act so no one in the crowd found out.
The sister also has a romance side plot.

[Rainbowheart]

Does anything on the Freaky Friday and other body switching stories list look familiar?