It seems pretty unlikely that Reyna doesn't have a dick here (unless she's got one hell of a left thigh), but given that the artist linked in the source goes by any pronouns and has recently retweeted other art of girls with penii that specifically request against using the term futa, I don't know that I would necessarily assume that this image is intended as such.
^Oh? When was this? From what I know she always had a tag for lewd, but it was confusing everyone. Since her normal art tag is "callillust", like Calli Illustration, and then the lewd one was "callilust", like Call Lust. One L off, so people kept making tagging errors, if she renamed the lewd tag then that's honestly a very good thing.
^ I don't know, since the artist never said one way or the other, but it's certainly not out of the question.
That said, I think it's a problem when art of women with dicks is instantly assumed to be futa (for what little futa as a genre can exist outside of weird hyper-fetishization of trans women and/or intersex people.)
^Personally I tend to label things trans in my head, but have gone through so many arguments with internet weirdoes that I just default to saying futa in most cases. But sometimes there's rays of light like Lavender Incubus or possibly this artist which is fun
to avoid making this get too off topic this'll be my last bit