As per hadith, when there is full penetration of male sexual organ into female sexual organ, ghusl becomes faraz for both. But in many cases, the male partner just touches female part without any penetration and gets discharged. Ghusl becomes faraz for the male. In such cases when there is no full penetration and female partner does not gets discharged, does ghusl becomes faraz for female also?
بسم الله الرحمن الرحيم
During foreplay if the glans of male sexual organ did not enter in the vagina of woman nor the woman ejaculated then in such a case ghusl will not be wajib on her.
Allah knows Best!
Darul Uloom Deoband
This answer was collected from the official ifta website of Darul Uloom Deoband in India.