A very sweaty wife

I am incredibly turned on by the natural scent of my wife and the best sex we have had was once when I managed to seduce her after a run. The scent of the sweat from her armpits as we fucked made me come harder than ever. But I am too shy to ask for it directly so we have never repeated the fun. I am content to take her sweaty t-shirt and masturbate while she showers. My biggest fantasy is that she will forget something and comes out of the bathroom and catches me rubbing my cock with my nose buried in her clothes. Then she understands how wild her smell makes me and finishes me off with a hand job whilst letting me lick her sweaty armpits. Then she lies back for her turn....