I have seen him be very tender with her. He even holds her protectively when they sleep. At worst he seems bored with her, but not angry. I seriously doubt he hits her, though her bruises have made me wonder.
The first night I joined I saw her sobbing while drinking liquor from the bottle in the tub. She had a couple nasty bruises on her thighs and butt, which have already healed for the most part. I was really turned off by the whole thing because I suspected she'd been beaten. But then Karel joined her in the tub and helped her wash her hair and her back while talking and singing to her. Once he had her smiling again, they went to bed and held each other. I want to think he is a nice guy who is taking good care of her while she's going through a hard time.