My Mom lives with my sister but sometimes I take her with me and my car is higher than hers. We try to use a step stool to get her into car but Mom has dementia and does not walk on her own. Getting her into my car is proving to be extremely frustrating and almost to the point of being dangerous. She cannot help herself to get in and I try to pick her up and put her into the car but she fights me and I am at my wits end. Please help with any suggestions.