I had visitors last week and their 2 children are both still in nappies. I provided a changing mat and facilities but both children were never promptly changed and the smell stunk the room out several times.
I had to keep telling them both that they needed changing. The baby was at one point going around with this bulging, bloated nappy hanging off his bum.
AIBU to expect parents to change nappies immediately. My daughter was never in a dirty nappy for very long if possible. She got nappy rash very badly and I would never let her sit in dirty or wet nappies.
I got really annoyed they kept delaying nappy changing. I felt they were both trying to get the other to do it and expected me to offer too.