F.H.
I wouldn't say that dreams don't mean anything, you hear all the time of people having a dream and then it "comes true". If it were me, I would just call my step bro and tell him about it. The very least it will make you feel better maybe that he can "warn" him.
Last night I had a dream I was having sex on the floor, specifically on the carpet (we only have tile in the entire house, that we HATE) and in my dream I was thinking how great it felt (the carpet, not the sex!). So I think subconciously I REALLY want carpet in the house when its time to buy! Lol!!! And well, its hump day after all. Hope this at least gave you a chuckle. =)