Aside from last week's deposit being pulled from her pussy, there's a worrying close up of something untoward around 5:45 - he even examines it carefully. Must have decided her tight cunny was worth it!
Unless there is a pungent smell and an itchy discomfort, then all that is, is the vaj deploying its self cleaning / lubrication. It does this during spontaneous sex. Be glad it does this, or else!
Very cute girl.