Well you wife is okay naman pala. No wonder why ganyan ka minsan sa wife mo. Which is fine naman. There is a saying na if you are already bless, sex life ang tatanggalin sayo.
Sooo if iyan gusto mo sa wife mo, better ask her nicely. I mean I know gusto niya pero ang tanong si willing ba siya?
I mean I know an author friend of mine na same sa situation mo. Ang ginawa lang ng husband niya, she can fuck anyone basta pasok sa standards ng wife niya. In return, better maganda ang story sa kanya ng asawa niya.
Cuckold swap or bull is good. Pero why not just let your wife find her own cup of tea and let her serve on you whether it is you watching or her telling you in details instead.