Woman seeing no discharge after an orgasm

Assalaam alaikum,

I have two questions related to women
1. If a woman has an orgasm during a sexual dream but when she wakes up she sees that there is no discharge. Does she have to perform ghusl?

2. A woman has a sexual dream during sleep but there was clearly no orgasm. Does she have to perform ghusl when she is not sure whether there was a discharge or not but clearly she did not feel an orgasm during sleep?

JazakAllah