Stripes (Phineas x Ferb x Reader) !!SMUT!!
- Reads 7,068
- Votes 46
- Parts 8
MatureOngoing18m
Last published Sun, May 10, 2026
y/n is Isabella's twin sister. After a long day of building a roller-coaster, you and Isabella stay the night the night at Phineas and Ferbs' house. Let's just say, things get HEATED. But, you have to be quite as to not wake Isabella. >:)
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