Oh OP that sounds so hard.
He knows nothing of your childhood nor your parents death?
How is that possible?
It reads to me your whole relationship has been about him, his mother and family.
His mother has died which absolutely is very hard but it is now further months of you carrying it ALL without any acknowledgement for all you do.
BUT he can be Mr charming and upbeat with friends, do sport, not work, while you do it all.
How you have tolerated this bullshit is down to that awful childhood because he sounds like the most selfish, self absorbed waster possible.
Your poor children.
Upbeat for his buddies?
Waster for his family?
Abusive, manipulative waster.
I think he should move out and do his grieving elsewhere.
At least he won't be able to abuse you and your children.
How dare he use you all as emotional punching bags.
He does because he is a deeply selfish man.
Lots of people lose a parent and don't behave like this.
I feel so sorry for you.
He is not a good man.
He NEVER has been.
You are being treated appallingly and I would start having a good hard look at who he is.
He is an awful man who is punishing you and your children because he is nothing but a bully.
I know grief.
I've seen it many times for parents that were adored.
Being out and about with a happy face but acting like a nasty prick at home has no part of it.
It does however if you are an abusive prick in the first place
Get on to Women's aid.
Protect your children.
Reach out to friends.
Stop tolerating his threats of not getting over it as a punishment to you....and general abuse.
Tell him move out and take his nasty abuse elsewhere.
He's just another selfish waster.
Listen to your Nan.
My husband lost his adored father to a brain haemorrhage and the shock was so dreadful.
Did he abuse those around him and bully them?
Of course not.
How convenient of him to opt out of family life for 3 months.
Hes a waster.
Get him out.