I am sorry that agreeing to sex with one's spouse is viewed as violation. Surely that is when it against your will, rather than reluctant.
But on the positive side, it shows that you are loved and attractive.
The problem with being reluctant is that you may not relax, which will make it painful.
Talk things through, at a neutral time, voice your worries, as well as your wildest fanatsies. Let your imaginations run riot!
You may surprise each other!
May be you can "bargain"? "I'll do this, if you will do that, or let me do that".
You may well find ways that bring you both pleasure, without feeling used. You both have hands, so use them, and plenty of lubrication.
The dance of the seven veils might be a good starting point for alternative methods.
Seek to find places, times, and things, that you would both like to try. Do not rush things, but travel slowly to arrive at a mutually pleasing destination. Hopefully, you will both reach a point where you can both satisfy each other, without feeling used or sore.
The brain is a most powerful sexual organ