We have learned so much regarding child behaviour through trial and error and of course education (and forums), the best way to deal with children's behaviours, development, milestones etc during our daycare career. Having this knowledge and exposure to children, do you find your extended family comes to you with child rearing questions and appreciates/respects your knowledge or do you feel family will ignore your "expertise"?

.The reason I ask is I do not offer advice or my opinion unless asked and then I offer in a suggestion manner (I was going to say suggestive, but that wouldn't sound right LOL). However there was an incident with my 6 year old niece whom is allowed to rule the roost and has a very stubborn streak.

While visiting my parents home, my niece began pulling on my mothers arm who was standing at the time. My mother suffers from severe osteoporosis and balance problems and has actually broken her femur (in front of me) by just getting out of a car. Her condition is common knowledge. So I see my niece pulling on my mothers arm knowing my mother will topple over and possibly injure herself.

Parents see and say nothing. I wait. Still nothing. So I say XXXXXX Please do not pull on Grandma, she will fall down. I get the stink eye from niece as she continues pulling on her arm so I sternly say her name as I rise to remove her grip on my mother. Parents say nothing. I later find out from mother they are furious with me for stepping in. Point is, I knew my niece would continue, yet my knowledge of caring for children did not factor in or cut me any slack in their anger. I know, as my mother does, that I did the right thing. (my mother does not speak up for herself)
Have any of you had an uncomfortable experience with relative's kids?