I think, the absence times of Kamilla are still fine.
I also think, it is best to consider the apartment in general. Sometime, a girl is away (maybe even only a short interim stay), but as long as the other girls are present (or there is even a nice long time guest) i see no reason to be upset. This apartment is living. ... A bit sad is that only one of the girls is really sexually active in the apartment, but it seems as if Kamilla has a BF now. So, there is still hope in this point. :)