hmmm...
If Mighty Mouse is, in fact, staying with Elena and Artur...then I have a bad feeling about this. I also think it might be a good thing for us.
Mighty Mouse is either lazy...all she's done in that apartment is play with the computer...or she has asked if she can help Elena clean and Elena doesn't want her help. In either case, her not doing anything is going to irritate Elena, who has been working her ass off all afternoon. I expect to see fireworks between those two before too long. Poor Artur is going to be stuck in the middle.
I get the feeling Mighty Mouse is a highly sexed girl. If her boyfriend doesn't come by every night, I think she will "take matters in her own hands". THAT will be a very good thing for us if she doesn't try to hide it.