Unfazed
Melody was making a bet when she said that because Donovan had been acting strangely as of late. If she hadn't restricted Genevieve with the reason of the latter owing her a favor, she would've assumed that Genevieve had told the man about the pregnancy.
Ironically, even though Genevieve was a love rival, Melody trusted her to keep her word. That was the reason she tried very hard to make Geneviev