Cock sucking sister

My sister will be 79 tomorrow I am 10 years younger. She's been been jerking and sucking me off since i was 40. True story.

It all started one summer when I visited her and her husband for a few days.
It was a particularly hot evening. I was lying in bed naked when the door opened and in came my sister.
All she said was wow. I quickly covered up and she called me a spoil sport.
Naturally I ucovered and let her see my hve hard cock.
She said don't move, and lft the room.
I thought maybe she had gone to complain to her husband that I was flashing her.
10 minutes later she came back in her bath robe.
Well she said aren't you going to show me that thing again.
I said on one condition you open your bath robe and show me what you have.
Without a word she stood up opened her robe to display a shaved pussy and two beautiful breasts.
Well. She said.
I uncovered my cock. Her eyes widened as she watched it grow and twitch.
Oh my god she said, I need to feel it, I need to suck it, but I won't fuck it.

She sat on the bed, took my cock in her hand and started jerking me.
I've been wanting to do this to you for over 25 years.
I want to watch you cum I want to feel and hear you cum.
Im going to suck you as soon as you start cumming. Infact I'm taking my dentures out and give you a gummy.to get the last drop of your cum out of your cock.

With all this dirty talk from her I was getting really close and she new it.
Shoot your first squirt on my tits I want to watch it come out af your cock she said.
I suddenly tensed and shot onto her tits while she took her teeth out with her left hand and dived open mouthed onto my cock and sucked with her tongue and gums as if her life depended on it.
I shot another two squirts to the back of her throat.
Mmm she said. I've waited a long time for that.

Tomorrow it's my turn I need you to lick my pussy and abuse my body with your mouth and tongue will you do that.
I surely will any time you want.
Im 69 she's 79 tomorrow and we have planned a licking and sucking session for her birthday.

She always keeps her pussy shaved for me and I shave my cock for her
It reminds her of little boys she would suck when she was young.