They seem to be fond of turning characters personalities around. Samson was a nice lad then they made him horrible, Naomi was a moody, miserable cow and now she's Miss Happy the assistant chef ..... and I'm sure there are more. It's as if they think Oh this character hasn't had much of a story recently, let's invent a whole lot of shite for them to deal with.
I think (and hope) that Chloe will disappear for a few months, then miraculously reappear on Mack and Charity's wedding day and give birth.