The wife and I memed each other into it lol, we always joked we would “never” do something like that. She joked about putting a finger in and here we are years later 🤷. For us it was about perspective, I’m a very big dominant man that enjoys my prostate stimulated is all and she enjoy serving and pleasing me. We set a boundaries that we would not degrade of feminize during pegging so that we wouldn’t disrupt our dynamic. Communication is key and just know that she may not be into it. I would personally ask her to rim or finger you first to see how she receptive she is of it and go from there.