Lena and Jack are siblings. You can tell the gender of these cats from their facial expressions and appearance. I think you can. Their respective sizes are also a factor. I don’t know much about these individual cats. The picture was posted by Christie L. Montgomery on Facebook. I know Christie. She helps to run Texas Maine Coon Rescue to which this website has donated monthly for the last 5 or more years. I believe, also, that she runs Koonary Maine Coons. My memory is a bit hazy about that. Perhaps Christie will comment. Thank you for posting this picture, Christie. They are both superb individual cats and I love the Maine Coon.