Kink or not ?

So I have stumbled upon a book series by Krystal Clark where it is talking about lactating for there partner and then drinking it as they try to get them pregnant. ... I don't why but it turned me on ..... A lot like jumped my husband they second he got home. I'm wondering if this a new kink I like if it is what's it called. Cause my husband has been asking why I'm suddenly hornier than usual and I don't know how to broach the subject since I don't know what this is or how to properly describe it??!