Thanks! What I was trying to say in the first sentence (the correct one) was that she will maybe get married. In the other one I wanted to imply that she might be getting married that that particular moment, which あの女の人はけこんしているかもしれません。 would work, since being married is an ongoing action right.
Thanks for the clear up on the あの女の人, I wouldnt wanna say something rude on accident! I forgot about 彼女, thats probably what I was looking for.
Thanks again, i'll be posting again im sure, I plan to be studing a lot and will no doubt have more questions
