Oral sex

Assalaamu Alaikum, Mufti Saheb

May ALLAH grant Mufti Saheb long life, good health & accept all your efforts for the service deen.

I have heard that oral sex is haraam, but to arouse the husband, is it permissible for the wife to kiss and lick the private part as well as around it, but not the tip of it?

Jazakallah