Goblins are canonically prolific breeders and have lots of children. I imagine that the goblins have heats where their bodies encourage them to get breeded. Nott absolutely hates it everytime it comes around, but she can't help how clingy and needy she gets.

+references to dub/non con w/ goblins
+multiple orgasms
++begging
++vaginal or analy
++nott being horny for all the M9 guys
++++shaking/trembling
++++++++++++++++++twitching organs