Take this month's Moron of the Moment, Ronnie Wood. Shacking himself up with some pint-sized Russian Doll (Ekaterina "Eka" Ivanova), and seemingly erasing the last 23 years of his marriage.

As per usual, it's all incredibly "alleged". Allegedly, the illicit pair swathed off to his pad in Ireland where she could pose naked for his artwork, obviously, and the little bambino will "allegedly" tell anyone who'll listen how desperately in love she is with her new rock star boyfriend.

See, this is the thing with the type of moral-less blonde 19-year-olds who'll prise away taken men – they're dumb. Dumb enough either not to notice their wrongdoing or, worse, ignorant enough not to care. And, presumably, for the "long-suffering" Mrs Wood, this will be the hardest pill to swallow.

The press are dubbing her everything from "fabulous" and "intelligent" to "gorgeous" to "incredible" – and then some. So imagine her confusion at being swapped for some average-looking teenage kick with, what, perkier breasts?

Does it give her a thrill knowing that the wife of this week's boyfriend (give it a couple more for good measure, he's a rich Rolling Stone after all), his partner for longer than her life years – is out there somewhere, crying? That his children and family are also confused, hurt, and let down?

To maintain a dignified silence throughout this ordeal is incredibly graceful (take note, Ingrid Tarrant). According to the tabloids, Mrs Wood is constantly deliberating over whether to forgive this "alleged" infidelity of her husband, and his latest battle with alcoholism.

And quite within her prerogative it is, too. These decisions are commonly taken too lightly. Far be it for us to will them back together, and to frown upon 23 years of marriage being thrown to the wind for some groupie.

Because Mrs Wood is an intelligent woman, it would seem. And where does one draw the line with relationship hurdles?

We live in a culture where temptation stares us face-on, more and more so every day. Yet we juggle beliefs and expectations that, even when faced with recurring infidelity and constant uphill battles, we must battle on and accept "every couple has its ups and downs."

Forgiving and supporting is plausible. But, when it is so frequent that the turmoil exhausts and wears one partner down, while the other shows little or no intent to change (even in the face of sacrificing their own relationship, marriage, kids or home), when is it acceptable – or necessary – to draw the line?