Real talk- if you can’t talk to her about this, even if you’re successful in getting her to try, it will be a challenge to actually do it. If you’re not already experimenting with her using fingers and toys on you, or watching porn together, or just incorporating some dynamics of kinky play into your sex life, this may an enormous jump.

Pegging takes patience, openness, vulnerability, and trust- to be blunt, it sounds like you don’t know if she will respond to your desire with any of these.

You could ask yourself how important this is to you, and weigh your options- living without pegging, the repercussions of asking her (good or bad), or going to a professional for the experience.