Breast feeding when returning to work advice

I'm due November 14 I'll be on maternity leave for about 3 months when I get back to work I'll have to pump. The conversation came up at work and I asked my manager how it would work like where would I be able to pump there at work. This is my second pregnancy with the company. My first pregnancy I was in a different town. I have been at my current location for a year and a few months. My first pregnancy I was able to pump in the managers office.

When I asked my current manager she said "oh well where ever you want...... like the bathroom or your car".... I was furious she didn't say a word after that just walked away. I wanted to asked her if she would eat her lunch in our public bathroom. Idk what to do! I need some advice please