Hello all, I'm new to this forum and also a first time buyer. Hope you'll be able to advise us on this. 
Husband and I saw a place that we like and went for second viewing yesterday. Before we left, the owner told us that there'll be another couple viewing it tomorrow. We are ready to put in an offer slightly lower than the asking price but should we put in our offer today or shall we do it after tomorrow?
We are worried that if we put in today, the owner may either counter our offer hoping that we will offer more or even tell the next couple how much we've offered and see if they'd like to top it.
But if we don't offer today, the other couple might make offer on the spot and be accepted? What should we do?