The end of this manga sure would be a twist if the MC ended up getting drilled in the back by Kenji and likes it. Either that or the MC getting transformed into a woman and still getting it from Kenji just to really set in the NTR revenge for him.
The whole my hot wife is now a middle aged hag thing is feeling forced as f*ck. The author could have saved time to get to their wet dream by just having the husbands having died in the recent past.