Then the quicker he realizes she could both protect and kill him the better. Really, there was ever only one man that she would completely listen to and depending which version of him was there....Well. It's debatable whether or not she would listen to the younger versions of The Doctor at this point.

Though, paranoia could be good in small doses. If handled correctly.

As for his reaction to her words, she just keeps on smirking as he talks and honestly, her mind thinks of The Master briefly before brushing that thought away and admittedly, he did have a point. Watching people try and figure out how something happened or even the shock on their face when they realize she got away with some impossible feat... it was quite the wonderful look.

River can't help but chuckle. However where he seemed to be evil, she was more of a chaotic neutral... not so much evil now a days anyway. Thanks to her parents and The Doctor. "It is rather fun to see them scramble. Especially when you pull off something they think is absolutely impossible."