Surely out of Jake/Liberty, Millie/Liam and Teddy/Faye somebody is going to stray whilst the other doesn’t, this will be left as the last recoupling when they all reunite.
I’ve only watched 2 previous series but it’s what happened both times (first one was Georgia and Josh, second one was Amber and Michael).
I imagine that’s how the producers engineer it all, the series has been pretty dull and I doubt they’ll let casa amor ending all the couples mutually deciding to stay together or both bringing someone back.