I think Yamakaze has a legit reason to be jealous. With this Casanova Teitoku, I'd bet that within a week of uncorrupting Destroyer Forest-Hime into Matsu that he'll add her to his harem, making yet another rival for Yamakaze in the TTK's heart and bed.
You're my child now.Hold up, Yamakaze!! She's a friend!?Complete Victory!!She's taking Papa!!I can't kill her.Step aside, Papa.Bring it on....Oh...What's with you....Don't be so gentle with me...