Work troubles...

I had been a SAHM for the past 21 months. I was shopping in a consignment store frequently. One day the owner asked me if I wanted a job. She said she needed a Saturday person. So I thought it would be perfect to ease my way back out into the workforce. She tells me nobody takes/gets lunch breaks. I'd be working from 9:30am-6:30pm. I tell her I can't take the job unless I get an hour break to leave & breastfeed/put my baby down for his nap. She agrees. Fast forward, after working about a month all the sudden she's acting like it's a huge problem & like I pulled this out of my ass & she wasn't aware of my needs. I'm completely blown away. She's been hassling me every time I see her about it. She even went as far as saying "can't you pump? Can't your husband deal with this?".

I honestly want to quit, it's really bothering me. What would you do? How would you handle this?