Tsunade gets horny because of Jiraiya’s teasing
Tsunade is weak every time when she gets horny, and Jiraiya wanted to use one of those opportunities to seduce her. As he got near her, he realized she was burning with desire, and he slipped his hand into her panties to feel that her pussy was soaked wet and ready for a big, rock hard cock.
Even though she wouldn’t admit it, she wanted him to fuck her. Jiraiya likes every Naked Henati Girl, but he has something special for Tsunade- she is and always was his favorite Hentai Girl.