Well this "dream Dylan loves Kelly" hasn't happened in any logical sense in the saga of Au Naturel at all.
It's a (very) random set of pictures of equally random pictures (as a bonus) within Au Naturel Chapter 09.
[ Au Naturel-09-5-Dylan Loves Kelly-Yoga Dream-Chapter-09-Bonus ]
There is no connection with the story whatsoever. Even the environment/surroundings have (visibly) nothing to do with the island.
Nevertheless and like I said before: I can totally envision Kelly and Dylan taking a stroll on the island, the day (or several days) after the hours long, nightly, orgy, with Kelly using the excuse of having to practice her (neglected) yoga routine. Of course Dylan will end up being fucked by Kelly because there are still remnants of the aphrodisiac in her system and because of that she insists that Dylan blows his load deep inside of her.
[ I can even envision Andre (who is missing in action for a while now) showing up during the sequence and him "suffering" the same fate as Dylan in a threesome where Kelly first enjoys Andre's black cock in a blowjob after which she also fucks his cock and Kelly telling him, forcefully, to empty his balls deep inside of her. ]