EastEnders’ Zack Hudson and Vicki Fowler continue to grow closer this Christmas, as the pair try to deny their feeling for one another. But is Zack falling for his sister’s sister?

Since officially reuniting with Ross, Vicki has kept away from Zack. But after their secret smooch, the chemistry between them is obvious. How long can they keep their hands off each other?

“All it took was one naughty kiss for Zack to catch feelings,” says our Walford insider. “Zack’s made a promise to Kathy to stay away, and Vicki’s since got back together with Ross. You could cut the tension with a knife, but they’re both fooling themselves it was a one off…”

With Christmas approaching, this week Vicki and Ross agreed to join in with Zack and Barney’s Secret Santa, to try and cheer up Barney following Teddy’s imprisonment.

Zack selected Vicki’s name out the hat and seems to have made it his mission to buy her a special present that’s sure to win her over.

When romantic Ross approaches Vicki in the café next week, hoping he can move back in with her now that they’re together again, things quickly turn awkward for Zack.

Despite the flirty atmosphere between him and Vicki, she tries to push him into the friend zone by giving him advice about buying a gift for Barney. Although it’s clear Vicki is trying to move on with Ross, Zack struggles to hide his disappointment…

On Christmas Eve, surrounded by couples enjoying the festivities together, even Barney spots Zack’s obvious affection for Vicki. Can he hide his true feelings for her – or will he act on them?

When disaster strikes on Christmas morning, Zack steps up and plays the hero to save the day. With The Vic closed and plenty of hungry customers, Zack cooks up a storm in No.31 in a desperate effort to rescue Christmas.

“Zack tries his best to salvage what’s left of the big day for everyone,” explains our source. “If Vicki isn’t bowled over by Zack’s tireless efforts to cook a full turkey dinner for everyone then she needs a wake-up call. Will she have second thoughts about her relationship with Ross?”