(We find out that the restaurant phineas was talking about is called chez phinbella to honor both of their crowning saves of the city.)

After they eat their dinners and desserts, Isabella proceeds with the following question.

'Phineas Flynn, as you know I have been in love with you since we first met 4 years ago, so I ask you in full view of this restaurant, will you, phineas Flynn marry me, Isabella Garcia Shapiro?

Phineas agrees 'yes, yes I will'

they have the ceremony at 14:00 (aka 2 Pm) that Sunday afternoon

and that cues the future where they become the parents of Rachel and Abigail Flynn and the aunt and uncle of Xavier, Amanda and fred Johnson.

The end