Echoing other pp’s, your strength and dignity are just awesome @Waffletots . When the shock begins to wear off, and if you begin to have a wobble think back to your initial reaction - being brave and decisive; hold on to that and build your self belief and confidence from this.
I’m actually not surprised he’s said nothing, he didn’t challenge your brother, didn’t attempt to speak to you when he was at your house. His initial reaction was telling. He’s been absolutely outed, and there’s nothing he could really say or do with your family there.
It might help to be prepared for if he does contact you, what you want to say to him? But also be prepared that he simply might not contact you.
Is he normally conflict averse and avoidant? If so, he may literally just run away. I’d brace myself for a further feeling of abandonment if this happens. But know that’s on him and his cowardice, and weakness.
Alternatively, is he normally quite calculating (perhaps not with you but other areas of his life)? Would you expect him to be off plotting?
I’m asking these things because it might help you plan what you do next.
Know this is ALL about him. There’s nothing you could have done to change what has happened, he did this. Don’t waste energy beating yourself up. Put that energy into looking after yourself ❤️ And hold tight to your amazing parents and family!