Abbie Simpson is Abe's (Homer's father) illigitimate daughter. I drew her with two teenage children, fraternal twins actually. They are both in high school. Abbie's husband passed away a few years ago.
Here is another memorable episode - "Lisa's Wedding". It's really a touching story about Lisa and her happiness. Before her wedding, Homer had given her a very soulful conversation as a luckiest dad. ... Homer: Little Lisa, Lisa Simpsons. I always felt you are the best thing my name ever got attach to. Since you learnt to pin your own diapers, you've been smarter than me Lisa: Oh dad! Homer: No, no. Let me finish. I just want you to know I've always been proud of you. You're my greatest accomplishment and you did it all yourself. You helped me understand my own wife better And taught me to be a better person. But you're also my daughter. I don't think anybody could've had a better daughter... Lisa: Dad, you're babbling. Homer: See? You're still helping me. ... Well, my father has taught me a lot of things. One of them is "Big boy must not cry" but this episode really prove him wrong, even I have watched it several times.