You don’t need evidence of his cheating OP, you have been physically abused, repeatedly, whenever you question his superiority.
He beats you so that you stay in your box where you belong, so that he can continue to carry on his Big Man Work doing exactly as he pleases when he pleases with no questions from you to make him feel bad.
He has no respect or care for you or for family life any more in spite of his charm towards others.
He’s an angry violent thug. And he’s gone too far astray now, to come back to reality. He can’t give any of it up. He’s caught in that trap of earning big bucks and spending big. He could also be in debt.
Please think about how you can leave him as there’s no going back to the good old days when you were equal loving partners. For yourself and your lovley children, it’s best not to linger on, it’s gone too far already.
You are his victim in spite of him trying to gaslight you to believe the opposite.
OP, all those fears and worries you have right now are entirely normal in this awful situation. None of it is your fault that he has gone so far astray to beat you and kick you.
It’s ok to be frozen with fear for a now, while you think of your exit plan. You are in shock.
But the very best thing you can do today is to face the first fear, the worst fear of all, …that of telling your sister and mum.
I promise you, after that, you will feel stronger.
Allow them the privilege of supporting you and your children through this. You really are worth it so take that first step.
Tell your sister this morning. Let it all out.
She would much rather help you than go to her lunch, I’m sure.
Good luck OP. You will come through this and be happy again if you give yourself the chance.