It's Ali's big day - the catwalk show - and tensions are running high at the studio, as the romantic comedy set in the world of fashion continues *twirls*. Davina has engineered a show clash which could put pay to Ali's audience. Fighting for survival, Marco hatches a plan to "un-clash" the shows. Despite the stress, Ali is surprised to find that Marco is the one who makes her giggle - that is, until they arrive at the venue and Ali bumps into her estranged mum, Christine. Needless to say, this leaves her utterly shell-shocked. It's been more than two years since she saw her mum following a wee disagreement over her new husband. Ali assumes her ma's turned up to make the peace, but when she realises that is not the case, the designer buckles under the stress and, well, peggs it.