Tipping the Owner

I got a facial today. At a tiny place, a room on the second floor of a hair salon. One room, one facialist. I've had quite a few people tell me that you don't typically tip the owner of a salon. So, after hemming and hawing, I ended up just paying her sticker price, no tip. Now I feel bad. Mostly because I wonder if other people tip and if she expected one. I always feel weird when I have to hand the tip to the person who did the service. I'd much rather put money in an envelope and leave. I'm planning on going back to her, so next time I'll tip, if not just to avoid this post-facial agonizing...