I think it is hard when you each earn your own pot of money for someone to suddenly want some of it. That does not excuse it though.
You need to sit down and explain that previously you earned X you now earn Y so where is the shortfall going to come from?
I have been a SAHM for 10 years. Dh always earned far far more money than me so we each had our own accounts that our wages were paid into and we then paid money into a joint account to cover bills. But we were each left with the same amount of money each month despite him earning much more.
When I became a SAHM the only thing paid into my own account is child benefit and we use that as a cash account ie I take it all out in cash. But I have access to the joint account and a credit card to spend as I see fit. He pays it.
I don't spend stupidly, we have savings for big stuff like holidays, car service, clothes etc
Each year we sit down and have a look at everything we have spent money on, mortgage, food, clothes, holidays, car stuff, stuff for the house and work out if we are happy with it or go how bloody much have we spent on clothes
damn those growing children!
But it is our money, not his. I save us childcare costs, cleaning costs, gardener costs etc etc
Re finding friends, lots of groups charge a teeny amount of money and lots are in church halls etc but clearly lots of MumsNetters go to them (like I did) so there are some great people there 