http://www.digitalspy.co.uk/tv/s149/...pg6hx51vnzyLLC
"We don't know the exact reasons for Aisleyne's decision to pull out of tonight's show, but we're guessing that the prospect of going up against Helen - who had said in the house that she would spit in Aisleyne's face - may have had something to do with it.
We've heard that producers were still trying to convince Aisleyne to change her mind earlier today, but her absence tonight doesn't mean she's completely ruled out going into the house in the future."
Welp if that's true, she bottled it :/