I've been reading the spoilers on Digital Spy and it looks as though she'll back to continue the 'hello Mummy' storyline over Christmas.
Likewise, we haven't seen Mickey, Dawn or Jase for a while either. Don't know about the actress who plays Dawn, but Joe Swash has been busy in the jungle for a week or two and Jamie Borthwick's working hours will be restricted due to his age and educational commitments, and this is typical.
Soap actors need to take breaks just like everyone else, to go off and do other things so as not to get stale or typecast. It also means that viewers can be kept hanging for just a while longer.
I mean, you don't necessarily see your neighbours every single day, do you. We're great mates with our neighbour but I still haven't seen him in nearly a week.