If she is musical (you mentioned band as one of her activities, right?), she may find Calc II a lot easier than most engineers do!

I, too lived in the world of men...both in school and then in my career (up until recently) as an EE. It is an adjustment for sure, but one that once you make it, can serve you well in your career for many years to come. Socially, it's really a challenge (even as an adult), so I feel for the women who do this as traditional age students. I didn't find my math/science calling until I was almost 30, so it was quite a bit different for me than it would be for an 18 year old!

Something she should keep in mind - with very few exceptions, all of the women engineers I know have done very well in their careers. Some stayed on the technical side and many went on to do other things with their engineering degrees, but both groups have been very successful. I don't know if it's a testament to the type of personality a woman would have to choose engineering in the first place or if is related to learning to survive in a male-dominated field...but the women who stick it out, do well. That said, many don't stick it out. Of all the people I know who dropped out of the engineering school for some other major - more than 1/2 of them were women. And I wasn't even at a particularly tough school, either!

That said, her boyfriend's parents sound like crazy people and I think she is very, very lucky to have a mom like you!