Spanish JOI hentai with your feet. How would Frieren do it? And Fern? And Ubel?

JOI Frieren. They want to use their legs to make you. How would each one do it? Frieren doesn't mind helping you, Fern doesn't like the idea and Ubel accepts without problem in exchange for meeting you. In addition, each one uses their feet in very different ways. Which one is your favorite?