Other ideas:

- You volunteered - Could've been you want to get away from your immediate family, you feel trapped in your hometown, you need to get away from the city, or maybe you're a closeted mega-slut who actually loves the idea of taking Grandma's place

- You were sold out - Maybe Grandpa demanded you specifically? Your parents tried to push back, but were threatened with being removed from Grandpa's will if they refused

- You don't even know - All you were told is to pack up and get ready to go live with Grandpa. You don't know if you did something wrong to deserve it as a punishment, if you're being seen as the only trustworthy option to take care of the old man, or what. You won't know exactly what your purpose for being sent to him is until it's too late to have anything to say about it

- You get blackmailed - Maybe Grandpa doesn't need a replacement for Grandma at all, but he found a reddit account or an onlyfans you've been running and told you to either move in with him to replace the fake cocks you've been using with his, or watch them be thrown out after he tells your parents

I'm open to discussing any other ideas or possible changes you may have. When reaching out, the best way to maximize response chances are including any kinks/limits you have or having a kinklist like the one I have on my profile, as well as possible references for your character, ready to send.

058bc84402ec10b4f163262b3cfed101bb3660537aace06ea4ee2049c1a2d49f24

[M4F] Grandpa has been having trouble with his hyperspermia ever since Grandma passed away. Unable to afford a full-time caretaker, the entire family comes together and votes to send you to be his new outlet.