Namechanged for this
Okay so SIL (DHs older sister) has always been hard to get along with. She has 3 lovely DCs but she is very negative about them and went they were younger they pretty much lived at the PILs house. But she seems to think she is the greatest mum in the world and nobody can compete with her.
She was also best friends with DHs ex-wife who left DH with their 2 DCs and rarely sees the DCs now and changes her number frequently and doesn't tell us or just doesn't bother answering. We think SIL is still in contact with her but when we ask she just laughs and says she won't say either way.
Everything I do isn't good enough, anything the DCs do hers have done something better. Anything I do is wrong and ex-wife did it better. We have limited contact with her to just family occasions for PILs who agree that she can be bitchy but ask us all to be civil when we have to be together.
So tonight DH is in work and the DCs have gone to PILs for a sleepover. SIL appeared at the door sobbing asking to talk to DH. When I said he isn't in she said she wanted to come in anyway. She was in tears in the rain in just a t-shirt and jeans, I thought something awful must have happened so I let her in made her some tea and got some blankets for her.
So half an hour later she had stopped crying and had taken control of the tv gotten some chocolate out her bag and kept laughing if I tried to talk to her. I gave up and just sat there watching her watch the tv.
Then her program finished and she asked me were the DCs were I said PILs house and she spent ages ranting about me taking advantage of the PILs (the DCs stay over there every 6 months or so at their request) I just nodded and explained that the PILs had asked them to come over. She wouldn't listen and kept saying I was a crap mum and ex-wife wouldn't abandon the DCs like that.
In the end I snapped and pointed out that ex-wife had abandoned the DCs therefore I am a better mum than her.
SIL started shouting that I was a witch who had made her brother into a crap dad. I said we were both good parents and she needed to leave now.
She ran into the dining room to the locked glass cupboard were my dad's ashes and some of his things are kept. The glass cupboard was built specially to store my dad's things away from the DCs because in his will he asked to be 'let go' on a certain day in the summer. He died in November so obviously this day hasn't been yet.
Anyway she smashed the cupboard with a small statue on my windowsill before I could catch her I grabbed her and I was begging her to just go. She hit me repeatedly in the face and in the end I let go she got into the cupboard and she chucked my dad's things everywhere and spat inside the jar holding my dad's ashes.
I am not proud of this but I lost it and I dragged her by her hair out of my house and chucked her out of the door telling her I hoped she died because no-one would care. She said that she prefered ex-wife to me I would never compare and everyone would be happier if I just killed myself.
I have closed the door she has gone and I have called DH and told him he has to come home but I haven't told him why.
The worst part is I have let my poor dad down and I can never make it right, some of his things are broken beyond repair and I must be the worst daughter in the world.