As others have stated, you have a misunderstanding of how the process would work in your case.
Intent was established at the port of entry. They didn’t think the had the intention to stay and they let them in.
People adjust status in the US all the time and for different reasons. I was one of them. I entered on an F1 student visa, had no intentions of staying, but alas! Met my now husband, fell in love, and here we are almost seven years later.
The officer will not think that you committed fraud. In fact, I don’t think they’ll even ask the question of “I see you had a k1 pending, but then you adjusted status. Why?” And if they did, you’d have all your medical information to back up why you needed your husband here