Dad's Mist Ghost Picture

"My parents were taking out a mortgage on their home and a guy was there taking pictures of their house. He took about 3 or 4 pictures in the living room and this was the only one that had a mist floating in the air. So, he gave it to my father and said he could have that picture, because he couldn't use it. We were looking at the picture and started noticing things in the picture. It looks like something is sitting on the love seat. Growing up in the house we would always see something walk by. So this picture does not surprise me at all that there might be something in my parents house. What do you guys think about it?"