【Loose Panties】My sister’s observation – One day when I looked into the living room

I have a younger sister, Mai, who is a year older than me.
Perhaps it was because of our age difference, but we had never really played well together or had a friendly relationship.

Still, we live in the same house together, so we see each other every day and have seen each other grow.

I’ve noticed that my sister Mai has been a little different from her normal self lately.
He looked at me with an expression of distress, as if he wanted to tell me what was troubling him, but he did not speak to me.

It really was just a coincidence.

I woke up in the middle of the night and went to the kitchen to get a drink of water, but I heard some talking coming from the living room.
When I gently peeked, there it was: …….

My sister Mai giving my dad a blowjob!

[why are you sucking my dad’s dick]

When did this happen?
Is this a mutually agreed upon action?
I’m sure you’ll be able to find something that works for you.

I don’t know what to do or what I should do.
Does Mai do that stuff of her own volition?
I don’t know, no matter how many times I think about it.

I decided to consciously observe my sister’s behavior every day in order to know her true intentions.

Fellatio, rear seated position, manual sex, normal position, Creampie sex, masturbation, cowgirl, back

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Production: loose panties

Basic CG : 11 pictures
Main story : 115 pages
Including no text : 192 pages
Both JPEG and PDF versions included