tinder dating

>matched with a girl on tinder
>profile says shes 18
>look at pics
>thatsALie.jpg
>ask her about her age
>says shes 18
>message a bit with her to find out more
>shes horny as fuck
>find her social media
>she's 13
>ask her again for her age
>still says shes 18
>she offers to sign a document that shes 18

If she signs such a document and pretend to not know her social media, can I fuck her without having to fear legal repercussions?

>If she signs such a document and pretend to not know her social media, can I fuck her without having to fear legal repercussions?
No.
Also who are you quoting?