Charmed. Season 4, Episode 14. "Three Faces of Phoebe."
So, remember in the episode where Phoebe casts a spell on her to see what her heart desires? Old Phoebe slaps Cole across the face and remembers when he became the source and the sisters had to vanquish him. Well, this brings me back to the episode I believe in Season 2. Where they go back in time and they save baby Belinda, their ancestor. There's a scene there where they take an apple peel and put it in the water to see the initial of Phoebe's true love. It floats in the letter of "C." The two think of it as Cole. Then as I look online, there's a theory that states the letter "C" is actually for Cupid. By the episode in Season 3, Phoebe has already met Cupid. Now we know who Phoebe actually ends up with. Future Phoebe leads up to her being bitter and I think they mentioned alone. So if we know who Phoebe ends up with and her future is bright with him, why is she alone? This can't be a writer's mix up considering we have already met Cupid before the episode 14, Season 4. Any thoughts? Or am I just rambling? Probably the latter.