i doubt the hound is afraid of his brother still, fire yes.
s for dany, you best remember that dany does not equal her dragons. Those are 2 entire differnt things, a dragon and dany, as well as with her protectors, you must look at the person in itself.
She is in not that strong at all, most of her choices came from desperation rather then real strenght. As for being married to a strange man is really that incredible terryfying that it breaks them apart, well then a great deal of nobly ladys have become simpering fools during the wars. Wich i found highly unlikely. You must not forget that it is a different mindset entirely and that it aint so big a deal in westeros, moreover among the nobles it is probably to a certain degree common.