Fics like The Eleventh Father

"No, Phineas," she says, because she's learned to tell the tone of voice he uses when he wants to ask about his dad.

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4. Capturing the Past by Winter_S_Jameson (Phineas and Ferb)
5. Mistakes and Worry by Fangirlwriting (Phineas and Ferb)
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7. I'll Be Honest With You by KissingLizard (Phineas and Ferb)
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9. What's She Doing Here? by kittyhazelnut (Phineas and Ferb)
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11. Don't Take Candy (From Anyone) by LigerCat (Phineas and Ferb)
12. Let's all assume the worst by KissingLizard (Phineas and Ferb)
13. Travel Sickness by Brokenmachine (Phineas and Ferb)
14. Lines in the Sand by The_Bookkeeper (Phineas and Ferb)
15. A Forgone Conclusion by wordsmith_kari (Phineas and Ferb)
16. Perry-digm Shift by talanashta (Phineas and Ferb)
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20. just to be quiet (with you) by MessOfContradictions (Phineas and Ferb)