Sonnet 29 (Spenser)
deprave = misinterpret
Not 'corrupt'—the older meaning is 'twist' or 'misunderstand.' She's deliberately misreading his gift.
bay = laurel crown
Bay laurel wreaths crowned military victors and poets in classical Rome. He gave her a loaded symbol.
meeds = rewards
She's lecturing him on symbolism: laurel is what defeated enemies give to conquerors, not what lovers give freely.
sith = since
The turn: 'Fine, if you insist you've conquered me, then accept the responsibilities of victory.'
trump = trumpet
Not the card suit—a trumpet for proclamations. He'll be her herald, announcing her triumph everywhere.