New guinea pig, old one acting odd?

[mew_neko]

last week I got a new male guinea pig, very loving and docile though somewhat overly active.

My older girl I got back in october tends to kinda ram her head up into his, she does this is me alot(and is somewhat scary)

but now she is chattering her teeth alot, I fear this may be bad, she also does this to me when she gets close to me in her cage ,though she just looks up after a while and likes her nose and lower chin scratched. Is she mad or is this an odd way of asking for more attention?

note this only happened since I got the male one(in different cage)