I do really like your shower and hot tub photos, but you have lots of those, so I assume you are looking for something different? how about making cookies, or doing something fun like that? Maybe diferent body paint? just be you most of all... if you don't enjoy doing the photos, then they won't turn out well.
I would get your self a nice leather-or faux leather skirt for some extra sexy shoots. Also buy a wig or 2 and suddenly you have different looks for sets - red wig would be good - very cheap on ebay or amazon