I would automatically think insecurities as well(being i am super self conscious and usually feel awkward around other females, even friends. Notto mention if I lived in a house with multiple people I maybe iffy as well with my boyfriend- although I feel I can trust him) anything from you falling for or having sex with one of these other women, to just not being the prettiest in the house.

I could also see her being uncomfortable if any of them were 'loose' and tried to come onto you, but I cant imagine everything single one of them being that way. However, to be straight up rude is weird. Like she is being an alpha-female.

Try discussing or asking her why she is like that, beside bringing up jealousy (which I could see being a reason) do you know she has those problems? If not maybe it really isn't the problem.

Good luck