Witnessing my wife being with someone else on our wedding anniversary

I have been married to Maki for 15 years. Due to a busy work schedule, I have entrusted most of the household chores to Maki. I thought I needed to do something to make it up to my wife, so I came up with the idea of giving her a day off each month. I would book a room at a hotel in downtown Tokyo for Maki, so she could relax comfortably there. Maki was very happy and often sent me photos from the hotel. Once, when I didn't see Maki send any photos, I reminded her.

Maki said she was busy, and I wondered what she could be busy with at the hotel. A little later, I received a photo that Maki took, but in that photo, there was a man's tie! From then on, my suspicions grew stronger. Determined to find an answer, I chose the day to carry out my plan on our 15th wedding anniversary. I booked a luxury room for Maki, while I made up an excuse to go on a business trip and secretly followed her to observe everything that was happening...