I have learned that if a woman has a sexual dream and sees a discharge then ghusl is obligatory on her. But what if a woman does not see a sexual dream but she felt sexual pleasure during sleep and sees a discharge when she wakes up, will ghusl be obligatory on her even if she did not experience a sexual dream?

Answered according to Hanafi Fiqh by Darulifta-Deoband.org

بسم الله الرحمن الرحيم

(Fatwa: 1511/1119/H=11/1434)

If she felt physical pleasure and saw semen (discharge) after waking up then in such case ghusl is wajib:
ولو تذكر الاحتلام ولم ير بللا لا يجب عليه الغسل والمرأة كذالك فى ظاهر الرواية لان خروج منيها الى فرجها الخارج شرط لوجوب الغسل عليها وعليه الفتوى اهـ فتاوى هنديه ج 1 ص 15

Allah knows Best!

Darul Ifta,
Darul Uloom Deoband