When decideding who should take the call - did you notice that not one of the housemates, metioned, looked, came up with a reason for or even directly asked Jade if she wanted/needed to take the call?
She didn't see her family on the plasma screen, she has been in the house far longer than Tim and had more trials and trauma than any of them. An she's ill and is missing her mum.
Only in the final minute when she had had no imput at all she suggested that she shouldn't speak to her mumas she may cry but her body language tells us she did. She supported Tim gracefully....but also cried when she saw him making the phone call.
I've never seem a worse example of their blatant disregard for Jade. If she vanished into thin air I doubt they'd even notice, they are so up their own fame obsessed a*rses. Poor Jade.