The mother is ready to take an active part in group sex

A cultural exchange student was staying with a married couple. And if the girl’s face is very good, then her character is complete shit and even worse. So she is regularly late to the table, finds fault with cooking, etc. Eventually the couple decides to send her back. But when the student finds out about this, she offers to do whatever she wants with her, even spanking her. Well, in the process the trio gets so excited that they naturally cannot do without sex.