I actually had an interview a few nights ago where only the Mom came. I told her I won't accept any child without meeting the whole family first. She fully agreed with me and stated she does a pre-screening without children and would like another visit so I can meet the family. I'm actually ok with it. This way (because their schedule is busy) she can narrow down her choice by one or two, come with family and make a decision. It also allows me a chance to make a decision too after meeting everyone. They also fully understand "first come, first served".