sweetly

adverb3

1. •
   With a sweet taste or aroma.
2. •
   In a sweet or pleasant manner.

   • "No, Auntie," said Hardman, sweetly, seriously. — 1958
3. •
   Nicely; finely; excellently.

   • Sitting in the seat with the engine off before that day, the gears slid in so sweetly, and double de-clutching was so easy, I had done it a million times. — 2000