I don't mean to "drip feed" but I will give you reasons as to my interpretations.
When I was dating dh, I was at university. Within a couple of months of graduating with an MSc, I had a well paid job (£20,000 per annum in 1999-2000 ish) and all was good.
As I continued in my career and moved employers, I landed with my dream job which was on a yearly fixed term contract. I had worked for the organisation in my dream job for 3 years when, at 2 months pregnant, I was informed that my contract was not going to be renewed. I know, if this were to happen in 2011, it would be illegal but this was before the 2004 (or whenever act came in). Alas, at 6 months pregnant, I was unemployed and unlikely to find a job in the near future. At this point, MIL was full of sympathy and very helpful to me. She was my rock and I appreciated that.
Anyway, when dd1 was 1 years old, I tried to return to full-time employment but it didn't work out. Somewhat crestfallen, disappointed and worn out, I was unemployed for a few years, when I decided to set up my own business. I had 2 children by then, and another on the way. It was when I became self-employed that the insults began to get worse.
My other SIL2 (MIL has 2 daughters) is also self-employed and MIL gives SIL2 grief for being self-employed as well. According to my MIL, SAHM at lazy etc, and self-employed women are SAHM in disguise IYSWIM and has contempt for both.
I have bit my lip so far but I'm getting fed up. Yes, I'm self employed but I contribute a lot to the household budget, although admittedly not as much as my husband. And I think this is the issue. My MIL thinks I'm "sponging" off her son and that he's doing "all the work".
I also overheard her say to someone, "if she really did graduate from (x) university, she would be in a proper job by now." Another reason why I'm tempted to send a picture of my graduation.
If I were really bitchy, I could say to her, "if your son was prepared to do his share of the childcare, then I could get that office job. However, your son obtains his good salary because he is able to travel abroad on a weekly basis, as he doesn't have the childcare constraints like his colleagues, since his wife (me) is self-employed and is able to be home at nights to look after our children."
Grrrrr! (Rant over, takes a bow)