Happy end ? Nah , i feel the author gonna play safe for this setting , as in the father give her a better fucking than the husband and she falls for his dick , get pregnant , the end , just like any similar NTR doujin....
While it’s the safe option to stick with NTR, I feel like the author’s been good with keeping it going. It’s nice to see her slowly break instead of immediately… And with how there’s a good amount of hardcore sex each chapter too it makes it worth it’s time. It may be very textbook but just a good one regardless atm.