I agree with the folks who posted before me. Especially with sachinky and Gary & Alia.
I have seen this happen before, it's sad and I'm not totally unsympathetic. However, sachinky hit the nail on the head: The K1 is NOT a 90 day 'trial period'. A great deal of what we go through is to verify a bonafide relationship that will result in a solid marriage.
IMHO Gary & Alia make the most important point for your case: Don't get into an overstay situation!