You and your Wife have been together for the best part of 35 years, until one day she decides to leave you for another Man.
You are heartbroken, not because she was a particularly good Wife, but more so the fact you miss the sex. That bitch was an amazing fuck.
However your Daughter has been so supportive. Bless her... helping with the housework, the cooking... she even offers to help you to release some of that cum after she finds your cum shots all over the house.
You decide to take her up on that offer, and over time you take full advantage of her as she becomes... essentially your free use sex doll. Do you feel guilty? Absolutely fucking not.