I wouldn't be surprised if she wasn't ill at all and the producers just finished the storyline early because her face doesn't move
It all seemed rather tame that Lola's mother turned up then just left with no real motive for leaving. She wasn't endearing and the writer's didn't spell it out to the viewer why she was brought into the storyline. Enough to say that Patsy was a dreadful actress, thank goodness she left before Lola, Danielle is actually showing us to be a real talent.
This last weeek's episodes have been dire, should be back on track this week though with the Denise/Ravi/Jack/Chelsey dynamic.