Reading between the lines here.. and I may be wayyyy out. But here are my thoughts reading your responses.
She wants you to be more dominant and her sexually submissive. She wants you to take control.
So rshrer than have these discussions going around in circles which is very unsexy, she wants you to take action.
So if being tentative and gently gently doesn't work then maybe she wants fire and passion? You to smack her bum when she walks past, grab her by the waist whilst she's doing the dishes, that sort of thing.
Then in bed, just grab her from behind and start kissing her neck then passionately kissing her. No speaking or hesitation but full on confidence. If she responds then control/dominate the sex. If she's getting into it, get on on top and pin her arms down, whilst kissing her, lead the foreplay, take her from behind etc.
Sometimes you just want to 'fucked'.
As a woman you can't really explain that in words because then it goes against the actual point of being 'taken' because your having to explain it in exact words and examples which defeats the point entirely. You want the man to dominate you which you can't do if you as the submissive has to explain what to do. Also if she's shy about sex discussions she'll definitely be too embarrassed to have to explain that.
I don't mean this in the kinky BDSM way but in general terms.
So she's telling you she shouldn't have to explain what to do, you have to start things off what she's really saying is 'just fuck me FFS!'
I've been with passive men before and it's a turn off having them being passive in bed and gently gently and hesitantly trying to initiate sex. Kills the mood before it's even began. Just confidently grab me in bed and get to work!
But you know your wife. Food for thought.