contentedly

from WordNet (r) 3.0 (2006)

contentedly
    adv 1: with equanimity; "`I bought it,' she said contentedly"

from The Collaborative International Dictionary of English v.0.48

Contented \Con*tent"ed\, a.
   Content; easy in mind; satisfied; quiet; willing. --
   {Con*tent"ed*ly}, adv. -- {Con*tent"ed*ness}, n.
   [1913 Webster]