My grandfather was a Man ho

Just found out I have an aunt and a cousin that I never knew about. I guess my aunt was given up for adoption and her daughter found us on ancestory.com due to a DNA swab. My grandfather fathered 8 children that we know of, but there is talk that there might be even more out there that we don't know of. The new aunt was born less than a year before my oldest aunt so he most likely was having affairs. He has four baby momma's and probably more out there. He passed away a long while back, but he never took care of any of his kids. I guess he just liked to make them. So I guess I have some new family members.