User blog comment:Poptropica411/Phineas plus Isabella equals Phineas and Ferb: Across the Second Dimension in Fabulous 2D?/@comment-3347644-20110409144235

Isn't it already constituted that Isabella will one day marry Phineas? Or Ferb, at that. Candace's daughter recognized her as 'Aunt Isabella'.

Not to appear pressed, but I really highly doubt Ferb and Isabella's relationship will develop further than a 'brother-sister' type bond. His stoic demeanor just doesn't properly suit her extroverted one for romantic affairs.

Assuming Phineas is who she will marry, I think we should just relax a bit. No matter if we witness it in full, their relationship *will* be developed further at one point or another.