What is the ruling of Sharia on one who pleasured herself during the daytime in Ramadan after her fiancé described her body, which led to the emission of fluids, and is her fasting acceptable?

The wife committed a grave error by speaking with her fiancé. She must repent to Allah with sincere repentance and refrain from speaking with him in the future. If what was emitted from her was maniy (semen), then her fast is invalidated, and she must make up for it. If it was madhiy (pre-seminal fluid), then her fast is not invalidated, according to the more preponderant opinion. The fast of the other days is valid and accepted, Allah willing.