I agree with your decision, aptlynamed. You will have more showings and that could lead to an earlier buyer. There are a variety of reasons this may benefit you:
1. Some buyers insist on putting the cart before the horse, that is just the way the are, and we can't always make them go about homebuying in the most efficient, sensible, and orderly fashion.
2. Even serious buyers started out as casual lookers. The casual looker that meanders through today could be a serious buyer in a month or two.
3. Relatives really do look on behalf of their family members. I have sold several homes because family or friends previewed for the busy buyer. There is an old story about a lady who opened every drawer, closet and cupboard in an open house she was visiting, the agent, anxious to move on to the next prospect who had just pulled up, pointedly asked the lady "Is there something I can help you with?' The lady, not peering up from the twentieth drawer that she had opened, responded "No, I'm just looking for my sister"
The agent walked over to the lady and the drawer pointed to the drawer and replied " Well, you won't find her in there!"