My brother caught me masturbating and now things are awkward between us what can I do?

My brother has always looked up to me, but a few days ago he caught me masturbating when he came home earlier than expected and I didn’t hear him come in. I was mortified and he was appalled. I have tried to downplay the situation but it still seems like things are awkward between us and I feel like a real douche bag. How can I make things right he seems disgusted by me? I am usually discreet about stuff like this and was being discreet as I’d never do something like this if I knew he was home and awake.