Srimad Bhagavatam mentions this incident, and would not point out rape in the slightest degree. Alternatively it's fun and play between them. I do Take note Shri Ayappa is definitely the son of Shri Shiva and Shri Mohini, and so she is probably going his spiritual wife And that's why https://bookmarkbells.com/story20029911/helping-the-others-realize-the-advantages-of-beej-mantra