Blink and you may have missed her...

I thought we were going to meet Xanthe's Mum Brooke played by Fifi Box.

We saw her in one scene in the Gold Coast episodes but nothing since?

Maybe it's like a return on Eastenders where they have a random one off apperence then fully appear a few months later

Yes, she will be lurking behind the bins outside Grease Monkeys, and the trees on Ramsay Street for a few months, before turning at their door for the end credits and 2 scenes in the next episode, before going awol again for a few weeks

She's back again in the next few weeks.