i've been through what you are going through. you think its a team, but hun this is corporate america. there's no such thing as "team" its whomever you can climb over to get to the top.

She's obviosly jealous and threatened by your work ethics and age. Just keep on doing what your doing and just keep back up in case she tries to slam you and by your conduct in general as a christian, your higher up will recognize this and know who's the honest hard worker and who's not.