User blog:Maplestrip/The Third Possibility of Aunt Isabella

You all know about the fact that Isabella becomes aunt of Xavier and Amanda. She would marry either Phineas and Ferb. I think nobody would have thought about a third (and very, very, very, very unlikely) possibility for Isabella to become aunt of them. It could be possible that Lida and Lawrence get another child, which would be around 10 years younger than Isabella. When Isa get's 40, this 'kid' would be 30. It is possible for them to marry making Isabella aunt. Also, if Linda and Lawrence would divorce (Won't happen, but still), Linda could marry a new husband which already has a kid. If Isa would marry that kid she would become aunt too. I think we can be around 99% sure Isabella would marry Phineas, and 0.999% for Ferb, but I just wanted to point this crazy fact out. :)