Phineas and Isabella decide to invite Isabella's friends into their sex life. Each chapter will have Phineas and Isabella having threesomes with different members of Isabella's fireside troupe, plus a bonus chapter with an extra girl.

Starts right after Act Your Age and goes from there. Phineas and Isabella are finally together, but there's still a lot to be said as they figure out their new relationship in the two weeks before school starts. No forced drama (or random -inator beams), just lots of fluffy Phinabella.

Rated: T (Send in any requests! Updating description/title soon!) Ch.2 Prompt: angsty post-break up phinabella who have never stopped loving each other one bit

"I sort of gave up when we got to high school." "Yeah, I think that's when I started having a thing for you." A story in which Isabella had realised she had to start making painfully realistic decisions for herself, and when Phineas realised exactly how much a certain neighboor truly means to him. (Not following AYA canon)

I finally wanted to post some M rated fics on this profile so here are a few things that I wrote a while ago and decided to post. Lemon warning: Phineas and Isabella. Must be 18 to read. Hope you like it.

Isabella is alone at her first week of college. Whatever is she to do without Phineas? Warning heavy lemon, hard smut, Out of character. OC. Read and review.

Surviving a near death experience can leave you feeling numb, cold, unsure if you actually survived. Exhausted, scared and alone, Phineas and Isabella let their bodies take over and loose themselves in the sensations.

Over the summer, Harry read "The Communist Manifesto". Now, he returns to Hogwarts a changed person.

Friends With Benefits; in theory, it sounds perfect. All the "fun" with no repercussions, no commitment, and no strings attached. If Isabella and Ferb decided to test this theory, nothing would change, right? Isabella would still love Phineas and Ferb would still love Vanessa. So why do the two of them just keep getting tangled together? The theory is about to be challenged.

It's Father's Day and Isabella decides to give Phineas a sexy surprise wake-up call, but that's not the only surprise she's got for him.

After a brutally long day, Isabella's state could be summed up in three words: tired, stressed, and horny. Thankfully, when she gets home, Phineas has a solution for all three.

Repost: Phineas has been feeling something lately towards his girlfriend Isabella, and it's about time that he shows it. Rated M for mature content.

18 year old couple Phineas and Isabella are in for a night of surprises when Isabella handcuffs Phineas to the bed, leaving him helpless to do anything as Isabella has her fun. Rated M for obvious mature content.

I've always loved Isabella. Maybe a better question is; when did I realize she was the love of my life? Maybe it was when I caught her coming out of the shower. Ya, that's probably it. warning lemon.