Reading this was so sad. I so felt for Petra: in the darkest moments of her life, the still birth, when she needs her husband most he turns to the bottle and decides to get consumed by his grief. Like it is so often no one can bear these feelings for too long and so he projects them on the person he thinks is guilty so he doesn't have to deal with them. And that's Petra who has lost the baby, his son, his hope for the future.

Petra really suffers, is even depressive and blames herself for screwing their new family up. On a subconscious plane Jim must sense this and sees it as her admission of her guilt and attacks her even stronger. He can't give love and understanding to someone who screwed up his life... or so he thinks. He's too caught up in his own feelings to see what he does to Petra.

She tries with every ounce of her being to make things right what almost destroys her emotionally but he wouldn't let her. She tries to distract herself with reading, TV, cooking, but nothing helps. The doll house I think is ambigious. On the one side it can't be a stronger symbol for a child's playground and must remember her of her "failure" every time she sees it, but on the other it reminds her of her childhood, a secure and safe place where she can forget and be herself. The dolls occupying it is the family she either had as a child or would want to have with Jim until everything went down the tube or both and fantasizing about them is her escape from all the crap in real-life.

That he calls her "Pet" however confused me a bit. This term in combination with a human being I would rather put into the sexual sector - D/s, sadistic fantasies and such. It could also fit in abusive relationships when the abuser ties his victim to him by both abusing it emotionally/verbally and physically.

But as it seems Petra and Jim had a good relationship until the stillbirth, at least you didn't mention signs of domestic abuse before it like verbal degradation, occasional slaps/beatings, isolating her from family/friends and locking her away and so on.

However Petra's reaction to his behavior are these of a domestic abuse woman or better an abused person in general: she tries everything to make Jim be the man he once was. If she's the woman again he'd loved then he'd stop to treat her so bad. This could easily lead to self-destructive behavior/feelings because if the adressed refuses to acknowledge the others tries that can go so far that the individual decompensates and mentally breaks down. Often abuse victims - no matter what kind of abuse - are only shadows of themselves when they finally are rescued from the abusive environment.

Petra however has found creative ways to compensate this development and therefore won't break so easily although she suffers severely. If this refuge would be taken from her however...

Since his behavior seems "only" be triggered by the loss of their child and not because he enjoys hurting and degrading women I'd put that "Pet" out. Otherwise it's an authentic drama about two persons coping with loss in their own way.