this kind of politics not really politics la. when u see those 'xiao li chang dao' or 'jie dao sha ren' or glory-whor then u know wat is politics man.
your company v small ah? local company? cos mnc usually dun have like dat one.
your boss galfren/fiance/gay partner should not have used his pc in the first place. work is work. work pc is for the empolyee to use only. even if wan to use, dun let pple see. be smart.
your lady boss and her boss confirm got previous clashes and/or your lady boss got even higher management support if not no way she can climb over your boss head. things not so simple la.
anyway you dun bother so much, just do your work, siam the politics and cover your backside can liao. unless u also one of those like to play game one then have fun