One who fasts to make up for Ramadan is forbidden to break it

Question:
Honorable Shaykh, may Allah grant you success. This questioner says — or rather, this is a woman asking, and she says: She was fasting to make up for Ramadan, and her sister invited her to break her fast during the day, so she did. Is her action permissible?

Answer:
No, it is not permissible. If one enters an obligatory fast, specifically an obligatory fast with a wide time frame, it is forbidden to break it. So, it is not permissible to break an obligatory fast. As for a recommended fast, yes, it is permissible to break it for a stronger benefit. Yes.