not so much serious problem u have but i suggest u two solutions for that :-
1. Share your feelings openly with your wife and convince her for using and playing with sex toys with u as this must stimulate her clitoris and G-spot, if she uses sex toys such as:- Butterfly vibrator, Rabbit sex toy,Rabbit vibrator she tends to be more involved in wild sex with u open her clitoris in front of you and she likes u with her 1-2 hours or more than of it.
2. Secondly, i prefer u to use sex toys like:- flashlights masturbators and c**k rings either master bate everyday.