I find the "breeding" comment pretty shitty.
The "nuclear" family with 2.4 kids and two happy parents is very much on the way out. There are many more step-parents and children having siblings with a different parent.
That doesn't mean those people are "breeding". Also, bringing the fact that she needed IVF to conceive one child was a low blow - I'm pretty sure Richie didn't particularly enjoy that realisation and that is not something anyone should be dragged down for.
I'm 27, almost 28, I have two children with two different men. I am married and have a failed engagement (which included a child from their relationship) behind me. In no way does my situation, which isn't too dissimilar to Robbo's comparable to an animal breeding.
The holiday issue bugs me. In my life I've been on one holiday away from my children - a surprise city break honeymoon, for a few nights, that my sibling and parents paid for.
There were times when we couldn't afford an "abroad" holiday (saving for a house etc) and had booked a UK break but my parents, kindly, decided to take both the kids with them too as a treat. However that situation is completely different and both children got. I'd never, ever, allow anyone to do what Robbo is willingly doing to her children.
It is all or nothing. 4 children or no holiday.