At the hotel with my sister.

Since my sister called, today is his birthday. You really haven't been in a hotel with him? You should tell your wife about it. If you have something, just say it. It would be better this way. If you are busy. He will be very angry when he finds out later. Since you haven't done anything, don't do it. Yunnan. Honestly, it will be better. He will understand you, too.