but anyone is free to support their ex if they want to, a default position of divorce being a full separation/clean break/no further liabilities either way after the settlement agreement has been reached wouldn't stop anyone who did feel they wanted to offer more upon their circumstances changing from doing so
I can agree with this, when my ex-wife divorced me, the judge/registrar, whoever, awarded her £X per month maintenance, plus £X per month for each of my two sons.
I was divorced so long ago, that CBs probably hadn't been heard of then.
I felt that the maintenance awarded to my wife and kids was such a pittance, plus even though I welcomed the divorce, as I was bang in love with the girl I'd left home for, I never forgave myself for hurting my wife and kids.
I approached my wife in The George, the pub opposite the High Courts in the Strand, where she'd gone with her father after we'd left the court, and said, "I'll have the maintenance money transferred from my account to yours monthly, immediately, plus, as long as you keep it to yourself, I'll give you exactly the same amount in cash every month without fail, until you remarry, or get into a live-in relationship in the future."
She knew that I was earning a few quid by more than bending the law, aside from being in a reasonable job as well, so it was in her interest to keep shtum about the cash payments.
Eventually, a couple of years down the line, she met a divorcé, a real nice guy it turned out, and he moved in with her, subsequently they married and she had another child.
Her maintenance was knocked on the head when she began to co-habit, but I kept up the maintenance for the boys until they were 18, and the cash payments too.