#one day she overhears him talking to a new aquaintance like 'Yeah that's my girlfriend Isabella! She's so cool.'

[thedupshadove]

Best form of Phinabella will always be "Phineas already considers them an item and is unaware that Isabella doesn't know this".

#phineas and ferb #phineas flynn #isabella garcia shapiro #phinabella #because they're kids right? #old enough to have crushes but it's not as if there's gonna be lots of PDA to disambiguate the situation #but she makes flirty comments and he builds her rainbow-inators so in his mind why would there be any doubt? #one day she overhears him talking to a new aquaintance like 'Yeah that's my girlfriend Isabella! She's so cool.' #And her eyes bug all the way out of her head