Great story!! Also have you ever thought about publishing this story on other sites? Like archiveofourown? Feel like you would get more readers 

“That’s it, Fuck my arse Mildew.” 

That was the line where I made a mess.

Very epic story.

Chap15. Overall very good.  I really liked the scenes with Valka, love her thick pubes and the orgasms she could not fail to enjoy.  Hope for more of her.

I found the constant switching between the scenes awkward.  Just as I was getting into one I'd be pulled out of it by dropping back into the other.  I would have preferred sticking with one at a time, or at least switching in for longer blocks.

Astrid's scene was pretty good, not as good as Valka.  I would have enjoyed a few more `I'm a whore's as she was sodomizing herself.

Hope to read more soon

Great, go on!

Best chapter ever. Mildew gets a MILF on as well. And it's Hiccup's mom, nice. The sex scene was really hot, especially when he told her to ride him, something Mildew wanted Astrid to do. Which I'm guessing will be anytime now, with Astrid getting ever so closely to breaking and be what Mildew wants her to be, his whore. And having Mildew have sex with Valka everynight or have her suck him off, easy way to break in his new sex slave. You already put Astrid spying on Mildew with Ruffnut, maybe next time, put in Astrid spying on Mildew with Valka, that would probably make her break even faster, knowing those two are getting something she so desperately want so badly. Or better yet, Mildew makes Astrid watch as he has sex with Ruffnut and Valka, making her see the thing she wants to badly not in her, and the only way she would be able to get it, is if she finally submits to Mildew willingly, and rides him until he finishes inside her. 

Great story! Can't wait for next chapter!

Very exciting, Mildew finally gets what he needs and now he needs to continue his pressure so that she is his bitch, including children.

Brilliant, I wonder what will happen next

Really loving it so far, really enjoyed Astrid spying on Mildew in the last chapter while he was with Ruffnut and starting to wish it was her so wouldn't mind seeing more of that, maybe with Mildew doing it deliberately in front of her to make her beg

Streets need the chapter update quicker 🙏

Chap14, took soo long to get to him butt-fucking Astrid, but the scene was very sexy.  Well done.

I don't mind Mildew's paln to break Astrid, just takes soo long sometimes.  It is sexier when they keep their own mind but still submit.

Looking forward to Valka.  Maybe Ruff can also get involved.  Would like to see her sucking Valka or Astrids breasts or licking their holes to get them ready for her master. Would like some armpit licking.  Prefer them hairy but smooth is ok.  Would also like to read Ruff fisting one of the other girl's holes, or Astrid fisting Valka.

Looking forward to more

Merlin, when are you going to give us a new chapter. Is Astrid going to finally break and go to Mildew? And since Valka is back, are you going to make her have sex with Mildew as well? That would be nice for Mildew, 2 blonde teen girls and 1 milf all to himself. And Hiccup doesn't have to know about it. And if you do put that, have a scene of a foursome, each one taking turns riding Mildew until each are filled up. Or even better, get Heather into this. 

Merlin, when are you going to give us a new chapter. Is Astrid going to finally break and go to Mildew? And since Valka is back, are you going to make her have sex with Mildew as well? That would be nice for Mildew, 2 blonde teen girls and 1 milf all to himself. And Hiccup doesn't have to know about it. And if you do put that, have a scene of a foursome, each one taking turns riding Mildew until each are filled up. Or even better, get Heather into this. 

This is an interesting fanfic on httyd and the most exciting