Green-Moo

No, I don't think this is 'normal'. And I don't think it is reasonable either.

There really is nothing 'wrong' with your wife going off for a few days with a couple of college guys. Just because she chooses to does not neccessarily mean that there is anything going on.

But, the fact that she does so without notice, without detailing where she will be etc etc does make me wonder what she is playing at. Either she's up to something, she's trying to get a rise out of you, or she's very, very selfish.

Neither of those options is good, so I suggest that a good long talk is in order to get things cleared up.

Good luck.