Neighbours spoilers: Mark and Roxy's secret fling is EXPOSED!

The secret is out when Roxy surprises policeman Mark with a drunken snog during a rowdy party at Number 22 on Neighbours!

Sheila Canning (played by Colette Mann) has been down-in-the-dumps since her break-up with Dr Clive Gibbons (Geoff Paine) on Neighbours.

So in an effort to cheer her up, Roxy Willis (Zima Anderson) arranges a surprise birthday party for Sheila at Number 22.

However, what starts out as a party for just family and friends takes a WILD turn after teenager Hendrix Greyson (Benny Turland) posts about the party on social media and turns-up with a bunch of rowdy gatecrashers!

Neighbours, Hendrix Greyson — The party at Number 22 takes a rowdy turn after Hendrix posts about it on social media on Neighbours (Picture: Channel 5)

Meanwhile, Roxy gets increasingly drunk as she waits to see if secret lover Mark Brennan (Scott McGregor) will turn up. But when he does, it is on official police business. The party starts getting out of hand and the police have been called!

But Roxy couldn't care less. She is so thrilled to see loverboy Mark that she throws herself into the copper's arms and OUTS their secret affair for everyone at the party to see...

Neighbours, Mark Brennan, Roxy Willis, Sheila Canning — Everyone discovers the truth about Mark and Roxy's SECRET fling on Neighbours! (Picture: Channel 5)

Meanwhile, Shane Rebecchi (Nicholas Coghlan) is still helping teenager Mackenzie Hargreaves (Georgie Stone) search for her estranged dad, Grant.

In the meantime, Shane and Mackenzie have begun to form a father-daughter relationship, leaving Shane's own teenage daughter Yashvi (Olivia Junkeer) starting to feel jealous and left out by all the time the pair spend together.

And so it is Shane who comes to the rescue again, when Hendrix takes a fancy to her at Sheila's party.

Neighbours, Hendrix Greyson, Mackenzie Hargreaves — Mackenzie is conflicted when Hendrix flirts with her at the party on Neighbours (Picture: Channel 5)

Hendrix thinks Mackenzie is the hottest girl at the party, leaving Mackenzie wondering if she should tell him the truth about being transgender. What advice will Shane give Mackenzie?

Neighbours continues weekdays at 1:45pm and 5:30pm on Channel 5