Step stool weight limit?
Marie And Alan
It will have sufficient leeway, but why not buy her a stronger stool? Her weight, however, may potentially be unhealthy
She knows she's overweight. Just buy a sturdier stool so she doesn't break her neck. If she asks why tell it's because you love her and don't want her to get hurt. Obese people usually aren't in denial about being heavy.
Doesn't cost a lot to go to the Grange or Lowes or Home Depot or local farm shop and get a step stool made for a man's weight.
Buy her a stronger stool or get a lighter GF.
I would normally expect there to be a reasonable design factor on these BUT if it's flexing and piping, it's a good sign she is overloading it. Get another stool with a higher rating.