This happened a year ago. Wife is still pissed at me about it.
We were riding in a state park on some dirt trails with our hybrids. The trails are about 3-4 feet wide at the base. I told her that I would take her on the 'easy' trail. That specific trail went in between two big trees, and the opening is about 4 feet wide, the same size as the rest of the trail. I go through, my kids go through, but the wife hits the right tree head on and falls. Not hurt, but she was pissed at me for picking that trail, saying I should not have picked that trail since the trees were too close for her to fit through. She may be overweight, but having 12 inches of clearance on either side should have been enough.
So, is it my fault that she hit the tree, or hers? She still insists that I am responsible.