How about..."Stay down, or I'll sic my Ghoul on you."
And we're forgetting that there are two other sisters that we haven't met yet and they are older than Moka. Would they want 'little sister's man'? Probably not but it would be funny.
And here's a thought: We've all seen Tsukune gone 'Ghoul' once and nearly so this most recent Chap. 6 Both times, he was seriously injured and bleeding heavily. Only then did the vampire blood effectively take over since there was so little of Tsukune's human blood left in his body. With this in mind, Tsukune should be able to avoid becoming a ghoul as long as he doesn't get injured past a certain point - theoretically speaking
