I will agree she is very into it and is loving it. It is very hot to watch because of that fact. But I do understand the concern about why now all of a sudden (which only she can answer). It could be anything from something jogged her memory to tell you or she finally worked up the nerve to do so. As a F who has been two serious relationships and smattering of other stuff, sex is different with every partner based on shared interests etc, which seems fairly obvious, but in moments where new and very different information about your partner comes to light it can be unnerving and hard to remember that. I wouldn't take it so much as anything against you or your sex life with her. From my POV and what I can read into the post/videos (assumptions are made), this is probably more about her and a kink she (for whatever reason) decided to share with you. I think finding out why now and confirming that she wants you to hot wife her would be the next step fo you. Kinks are complicated, the intensity of mine fades off and on over time, but they do affect relationships even if minor so it's better to have that discussion now than deep into your marriage I guess. I really hope y'all can get clear with one another and find out if this is what she wants, and then if it's right for y'all as a couple to do.