Matthew groaned as he felt his daughter's mouth, enjoying the way her tongue and hands worked over him together.  "Mmmm what are you talking about beautiful.  You are amazing at this."  Her touch was so wonderful, maybe a little innocent and inexperienced, but it was so splendid.  Part of him had to keep reminding him that this was his daughter sucking on him, but he really was beginning to not care.  As he watched his brother going down to play with her some more.