NSFW I'm confused about this even though we communicate openly.

My wife and I have been together for about 10 years.

She knows I love to have her go down on me and make me cum.
She finally knows and believes I adore making oral love to her. She still is puzzled why I adore it and want to do it often.

My eating her reliably makes her have intense orgasms and it makes her all lubricated and ready for intercourse. (She is post menopausal and does not lubricate much on her own.

She never goes down on me unless I request it. She used to do it enthusiastically. Now she does it with little signs of excitement or pleasure. Her explanation is that she wants me to come inside her vagina, especially after she has just had her orgasm. Of course I love to please her but I feel disappointed that she shows so little interest or enthusiasm for doing what she knows is my very favourite treat as far as sexual experiences go.

I don’t want it so frequently that she would miss out on having me cum inside her pussy. When she does it, her main focus seems to be on preventing me from coming while she is doing it.

She never minded having me cum in her mouth before I got her to relax and enjoy my making her cum with my mouth.

Is there something I have not make clear to her? Is there something I am failing to understand?

I would especially appreciate advice from those who enjoy receiving cunnilingus and enjoy lovemaking with men.

Thanks