The punch is at the end, when she points out that real women are listening for the real budget. Which is true.
What isn't so great is the implied divide between mumsnet and real women.
If there is a divide, it's that politicians are still not getting it quite right when they try to engage with real women, through media such as mumsnet. They, still, try to do charm over substance.
That's where the divide is; not between real women and mumsnet.
But, tbh, it's hard to know what else the politicians were going to do, since both parties have, heretofore, been pulling punches about spending plans. Should be hotting up a little now, though.