Bazooka is more or less a part-time resident. Souris doesn't like it. When he is outside and wants to come back in again, "all hell breaketh loose." But some days, she is less aggravated and has a different approach of telling him who is boss(lady).
Either way, it's interesting and educational to watch.
(update: Bazooka's life was sadly taken by a passing car on October 28, 2012)
Bill Evans and his Symbiosis piece perfectly illustrate this feline encounter and may this serve under the cloak of Fair Use and educational purpose.