Only because dragons are the most powerful creatures, it takes a strong warlock or witch to overpower them and take their power for their own use. Lucifer is confident that Leanne is more in need of his power and doesn't have to worry about her being a threat.

"..." He's about to say the affections isn't necessary but not unwelcomed, but instead changed his thoughts before he could speak. "Yes, now about the dessert. Ah, you did make cake didn't you?"

He eyes the cake with amusement. It wasn't the best-looking cake, not by appearance. He took a bite and he eyes light up. It was delicious.

"The cake is very delicious." And took several big bites until he wanted a second slice.