If the driver (your husband) felt fine but the passenger (you) felt unstable I would think it was just something you need to adjust to. I recall my wife having moments of anxiety the first couple of times we took our coach out. Your perspective is much different in the front seat of a MH than what you're used to in a car. You sit much higher and you're in front of the steer axle. This can make turns feel un-natural. My wife doesn't have a problem with it anymore and I know our coach is very stable compared to some I've driven - it just took a few rides for her to adjust.