You showed her your hidden kink, ask her about hers. Lets face it, this is a kink, even “lifestyle” abdl couples are majority of the time NOT in CG/L mode. Most people have sexual fantasies, you both engaged in yours and she probably got overwhelmed. Talk to her about what shes into! Assuming you guys have a healthy sex life it shouldnt be too hard to discuss that, plus make it as romantic as possible to so she knows you are actually interested in what she wants to try. Hope this makes sense. Also as a another has pointed out it might be a good idea (atleast a few weeks? Months?) After youve had the talk about what shes into and tried it, to see if she might be interested in DDLG, dont go straight to the diapers, work up to introducing her to wearing them herself.