Neither You ,I or the F.O. are in any position to judge the genuineness of the application in this case the key factor ,as I see it is that the refusal led to an earnest desire to meet quickly, then carried out but without any possible foreknowledge of the result but that does not indicate that the original application was not genuine , unless anyone would suggest that there is no Aunt to visit,.
The reason I am adamant on this point is simply that to support the subsequent refusal by The C.O. to a fiance visa is tantamount to agreeing to divination on their part, nobody lied or was even economical with the truth