My MIL asked me this question today.

Basically, my inlaws visited my SIL last weekend. They had all returned from a walk and my 1 year old niece was sleeping in the pushchair. My MIL suggested that my SIL should leave her outside in the back garden to finish her nap, while they all went indoors to have some tea, because fresh air is oh-so-beneficial for babies. My SIL declined. MIL then went on to insist that, if they left the door open, they would hear her when she woke up. SIL refused, stating that she didn't feel comfortable leaving her outside alone. My MIL obviously thought that this was ridiculous!

What do you think? (I know what I think but I'm curious to see what others think).