The Fat Dog Has Returned

My house-mate's sister returned her dog today no too long ago. A blessing in disguise is they left immediately afterwards, allowing me to re-introduce him to my dogs since he has been gone for 2 weeks. When my house-mate is around, it never fails, he gets freaked out and territorial. If she's not he's find with my dogs, no signs or agression and actually plays with Yoko. 

I wonder how Ceaser Milan would handle this case, because its not the owner insecurity that causes the problem, but anger. She's always angry at the world, blah blah blah. But no problems what so ever. He is a smart dog too, he remembered even after two week he's not allowed in my room and stood at the door frame of my room but dared not enter.