I knew he'd get up this morning and act like nothing happened. This is all deliberate to make you think that any reaction from you is over the top and unfair. If you raise it with him, he will DARVO (Deny, Attack, Reverse victim and offender) and probably get angry. He'll tell you that you're being completely unreasonable, maybe even you imagined all or part of it, he'll minimise his own behaviour and find a way to blame you (if you had taught your son properly/put the keys somewhere safe/didn't always question him and undermine his parenting...)
I can predict this, because abusers are all the same. They follow the same patterns and act in the same ways.
He may, if you keep pushing back, start acting very remorsefully. Tell you he was so stressed, he couldn't cope. He knows it was wrong but he just felt he'd been pushed so far. He's been stressed, depressed, his own childhood was terrible, he's done so well to stop drinking, you don't have as much sex with him these days and he feels left out, whatever, whatever and of course it will never happen again, let's have couples therapy.
So you feel sorry for him. It's all okay for a while. Then it's the next thing.
I know people will turn up on this thread to defend this man's behaviour because there will be a call to action on some incel site somewhere. But take it from someone who knows: abusers all have the same pattern. You can't change him, so you need to decide what to do about him. Talk to your sister and your mum together, maybe? It sounds like they will want to support you.