I'd be concerned about why she is bruising. Even if I deliberately de-tuned my fit to make the ride as uncomfortable as I could, I would not bruise, I would just be sore and chafed. Is she on any medication which thins the blood (many medications you wouldn't think of do that) to make the surface blood vessels that sensitive to pressure? Perhaps she is calling soreness and the skin irritation caused by chafing bruising? It seems odd that she would actually bruise from too much weight on an inappropriate spot unless she is extremely prone to heavy bruising via medication or genetics...