Srimad Bhagavatam mentions this incident, and will not point out rape whatsoever. Rather it is actually exciting and Enjoy among them. I do note Shri Ayappa could be the son of Shri Shiva and Shri Mohini, and so she is likely his spiritual wife which is why he caught her https://bookmarksea.com/story19944107/5-simple-statements-about-mohini-explained