1. in a secretive manner; with a preference for secrecy; - Example: "the teacher raised a hand to him, slightly and secretively, because he was her favorite"
WordNet (r) 3.0 (2006):
secretively
adv 1: in a secretive manner; with a preference for secrecy;
"the teacher raised a hand to him, slightly and
secretively, because he was her favorite"