Can someone tell me, why is that Osman don’t call Ayşe Hatun “Yenge”, as Ertuğrul Gazi used to call Salcan Hatun “Yenge”…

Can someone tell me, why is that Osman don’t call Ayşe Hatun “Yenge”, as Ertuğrul Gazi used to call Salcan Hatun “Yenge”?