My wife is loose down there?

My wife is very loose down there and doing it is almost impossible to feel pleasure. She claims to be doing kegels but I haven't noticed a damn thing and I'm getting very frustraded. She tightens up a little during intercourse then let's go and its hardly a grib at that. Its like putting my dick in soft oat meal. NOT pleasurable AT ALL!!!!!! I want to feel pleasure and she refuses the mouth or anal or any type of sergury. Are there any kind of particular excersises I can have her do to tight it up real good?