Bloody cow! How dare she behave like this, does she not know it's against the law to discriminate against someone because they are pregnant.
I am 22 weeks pregnant and work in a gym, where if I'm on the late shift, would have to tidy up many heavy weights. My line manager has been very good and did a risk assessment in my first trimester and then another in my second.
On both ocassions, I sat down with my manager and went through the form, I had to read through and agree on what I can and can't do in the job and then sign and agree a date for my next assessment. This idiotic woman doesn't sound like she knows anything about employment law.
Others may have said this already, your daughter should seek advice from ACAS. It sounds like she was being bullied. Even if your daughter doesn't receive any satisfaction from a complaint, perhaps it will make this woman think before she behaves like this again.
http://www.acas.org.uk/index.aspx?articleid=18 64