Grandpa Granddaughter

[FatCat]

My granddaughter has recently come to stay with me at my apartment.
Since moving in she walks around the apartment in her under ware (panties and sports bra).
I admit I like the view so I haven't stopped her.
I have smacked her on the butt a couple of times and the other day when I was in the kitchen she kept getting in my way so when she was reaching into an upper cabinet I took the opportunity and gave her a small spanking.
She giggled and seemed to like it.
I noticed that her nipples had gotten hard.
Lately she has started leaving the bathroom door open when she is peeing or showering.
She knows I can see her with her panties down or even naked going so far as to have conversations with me while I'm standing by the door looking right at her.
I would like to transition this into a sexual relationship and I am looking for advice on how to do that.
How did you get you daughter or granddaughter to have sex with you?

[FatCat]

Just an up date to this post.
Things have progressed considerably and I am now involved with my Daughter and both Granddaughters!!!
Things went from zero to a hundred in just two weeks and I am one happy Dad\Grandpa.