.. The last time I went over there to water the grass I had to shit pretty bad so I checked to see if I could get in the house from the garage and I could ...
You saw nothing! You had a delusion from the cramps of needing to take a shit and you simply saw things. If he didn't say go in the house, that can be a breach of trust. Door locked or not, you didn't have permission to enter.
Now, that said...Slightly hint about wanting to grow. Maybe "accidentally" let him see you have a copy of high times. In no way let him know you violated his privacy. He may of forgot to lock the door, meaning he did not want you in there.
I have a brother. In no way or how will I every let him know what I do. He likes to shoot his mouth off, and I would not trust him any farther than I could throw him. You don't want to do something that makes your brother see you that way. If he doesn't come forward from little hints, DROP IT LIKE A LOADED DIAPER.