Understandable.
As far as the girth goes don't feel bad. I assume you all ready have [words=https://officialhydromaxpump.com/?uid=6&oid=2&affid=98 ]
Bathmate[/words] in your routine?
Toys.
Don't buy anything on your own!
Make a session with her.. let her pick a toy out. You will see this way what she likes (thanks online shopping

).
What you could do as a gift if you can spark an interest in female exercises are ben-wa balls but again, let her pick them out.
Has she ever asked ,,how am I down there? loose?''
Remember women have similar insecurities as we males do. That's your cue to tell her that shes not but since shes worried you'd
help her to find some workouts for her(and then its showtime

).
There are many benefits if she works the muscles. She will feel more of you(increases orgasm possibility) and can be so tight you cant even get in

Also think of it this way: If she picks out perfect toy for her you have exact goal to thrive for + she will not cheat on you if shes satisfied.
Own experience.
I have been with my wife now over 12 years (7married) and I have never managed to get her off just with my dick. I can lick, finger her to heaven
and back without issues. Our favorite pose is 69 as you might gather

I still believe I can get her off.
Took her by surprise visit to spa in another town to get away from all the daily shit and got really close to blowing her.
Taking her mind of daily shit helps a lot. Also you gotta cook them on slow fire (get them hot for the evening).
Whispers, dirty SMS's, making her recap some past hot events etc etc.
Don't obsess around the girth topic too much it will get on her nerves if you keep at it.
To sum all above up:
1. get with her a toy
2. get her balls + exercises.
3. take her away from daily hell for few days, just you two and take time out on love and memory making.
4. Keep you Penis Enlargement up, it is for you!
Ps. Sorry for my poor English and longwinded text.
K.