I just found out my 24 year old brother is gay. What should I do? Ask him about it, or just leave it be to when he decides to come out?

So this friday is holiday, so my mom and I decided to go visit my brother and aunt for the extended weekend, but my brother already had stuff planned so he will only be here on saturday. I didn't bring my laptop so I asked him to use his through a text mesage, he said sure. I play a game called MapleStory and I was trying to find the folder in which it's in, and I accidently misclick and go into an images folder that has photos of him with this boyfriend. What do I do?