need good advice

We have a very healthy sex life...... I used to be able to satisfy my wife , and I dont do anything different now. No bllx If I concentrate I can enjoy and my wife can for 90 mins excluding foreplay.... shes still gushing I'm knackered and any normal gal would be mega pleased. She could go alnight....its not bigger cocks.....its not the want for someone different.... but I I know she could enjoy sex for hours if I was there and turned her on to that pitch. I find it great that she is so sexy , I find it a real turn on that shes so randy , I would like her to say at somepoint enough is enough !!!.... I would love to see her totaly fulfilled, I dont know how many or how long it would take. I am of the mind that I wouldnt get jelous of pure sex if she didnt pick and choose the suiters and i.m sure in the right circumstances she could realy go for it and we would both subsequently enjoy it. Can anyone give me REAL advice from experience please.