I can see straight through Rochelle Humes' slap-in-the-face swipe at Myleene Klass after her cheating confession. No wonder tongues are wagging: LIZ JONES - suong

Is there no such thing as the sisterhood? Solidarity? Do famous women now play out their entire lives as though in a giant game of Love Island – vying to get one up on each other while wearing a skimpy bikini and sipping spicy margs?

Rochelle Humes, the former Saturdays popstrel, and her husband, JLS star Marvin Humes, are on holiday in Ibiza celebrating their 13th anniversary. Unlucky for some!

It seems no celebrity can go abroad without a) posting a selfie and b) teaming up with a gang of equally famous friends to make the rest of us feel inadequate.

But there’s more to this latest gratuitous display.

Because slap bang in the middle of one fun, bronzed, boozy selfie posted by 36-year-old Rochelle on Instagram, we also get a great, big slap in the face for feminism.

Sitting next to Marvin Humes, arms slung around shoulders, veneers glinting, tapas and vino flowing, is a man who surely should be sheltering in a beach hut in Southend, ostracised and alone, shivering, repentant.

For the man Rochelle has snapped so supportively, so intimately, so passive-aggressively, is none other than Graham Quinn.

For those of you more concerned with global warming and the cost of childcare, Graham Quinn is the former husband of – yes, another former pop star! – Myleene Klass.

Last week Myleene, who is so stunning she belies her 47 years, revealed that before their 2011 wedding – which was in a cathedral, no less – Graham had cheated on her at her birthday party in her own house, on her own balcony, with an as-yet(!) unnamed celebrity female. A woman, we are told, who now trades on her ‘family-friendly’, wholesome, toothsome brand.

Hmmmm. It’s like a sun-kissed game of Cluedo.

Speculation is rife, given the Ibiza selfie, that Rochelle is indeed the ‘balcony woman’.

And if – it’s a huge ‘if’ of course – Rochelle really is the woman Graham cheated with, I imagine this jolly photo will prompt Myleene to lash out and finally reveal her name.

If I were her, I’d take out a billboard on Piccadilly Circus.

If I saw a photo of my cheating ex, all relaxed on holiday with people I thought were my friends, or who I had at least mwah-mwahed on a red carpet, I would be very upset indeed.

Aren’t women supposed to stick together, not take his side? I can imagine Myleene studying the photo, looking for signs, asking herself, ‘Why is he looking so happy when I’m sobbing on podcasts, suffering from PTSD?’

When we break up with a man, we comfort ourselves with the thought he has gone to seed, is living alone in a bedsit with only quiz shows for company – not having a great time!

This post could be disingenuous, an unhappy accident. But I wonder if it’s just a little shadier.

Rochelle could simply have been sunning herself in the Balearics with the cheating, bearded b*****d (remember, Quinn and Myleene already had two daughters, now 17 and 14, by the time the balcony creaked with the unzipping of clothes and twisting of limbs), but why not keep quiet about the fact?

Why pour salt water on Myleene’s wounds by typing: ‘Our annual non-negotiable child-free trip with old friends’?

‘Old friends!’ Myleene will have wailed. ‘Whhaaaaaaa! What about me?’

Far too many women experience schadenfreude when any man but their own cheats. ‘Ha! Not so perfect now, are you?’

Rochelle, by posting this photo, is saying that men will always be forgiven. It’s in their nature, poors little lambs.

What happened to you, Myleene, is not a family tragedy, it’s all a sangria-soaked laugh!

She is also, horribly and terribly, laying some of the blame at Myleene’s feet: ‘Look, he’s a nice guy! We love him!’ I think it’s a slap in the face with raw calamari.

Hidden message? It seems blatant to me.

In the post, Rochelle writes: ‘72 hours in Ibiza… sun, sea, belly laughing, questionable dance moves and spicy margs that tasted better than our decisions.’

If I were Myleene, I’d be thinking, ‘What decisions? Why? What?’

Personally, I don’t think Rochelle is the babe on the balcony: I think she has better taste.

So, why taunt Myleene and, for the rest of us gawping at this photo, why risk being painted as a woman who sleeps with a father who is thoroughly taken?

Rochelle is beautiful, has a great career and is secure and happy in her relationship. Where is her understanding for those of us who are far less fortunate?

To seemingly pledge allegiance to a man who caused so much hurt will tarnish her pearly whites, innocent or not.

Because, like elephants, women never forget.