That would depend on the intensity of the autism.
If the autism is at the level where she's barely more than an organic computer that has difficulties handling things outside her routine, then fucking her would be bad regardless of age since consent would be near impossible to gain or even determine.
If the autism is at my own level, where she has some of the problems from autism but is still able to function normally and has the potential to give clear consent, then age is the only problem here.

Ah yes, the meme queen.
The rewrite is an absolute legend, standing with cockney slang and hilariously bad foreigner stereotypes.