<human>: Last night my dad got home late. As per usual. He looked sad though this time. Like a zombie. I said hello to him, he went upstairs and got changed and sat down on the sofa in the living room with me and my mother.

He was sitting on the edge of the sofa though, looking emotionless and tense. All of a sudden his face screwed up and he started crying. He left the room and collapsed on the floor and started crying. My mother asked me to leave the room so they could talk. So I did. 

I was in my room at midnight and I hear my dad down stairs. My mother later followed him to the kitchen and I heard my mother crying and she said "I fucking hate you! For over a year!". Then I heard some ruckuss and I just put my headphones in and tried to tune it out.

I got up after everyone in my house had went to work and spent all day worrying. My mother got home and explained everything. She said that over a year she KNEW that he was up to something. Me and my mother saw him buying flowers on valentines day, and put it this way. My mother didn't receive any flowers.

Turns out my dad had been buying gifts for this other woman, exchanging texts, buying flowers for a very long time. My dad confessed everything last night and my mother informed me of what happened.

My mother also said that she felt betrayed because while I was going through my own depressive issues she was left alone to deal with it and my dad kept telling my mother I was fine and to not 'encourage' me. All the while my father was coming home late and not talking to me or my mother.

My dad then came home and spoke to me one to one. He confirmed everything and said that this other woman wanted him to move in with her and he refused. He also said he is sorry for mistreating my mother and tearing the house apart emotionally.

My dad has testosterone issues too and has to get regular injections to fix it.

I have no fucking clue what is going on.

Can you succinctly summarize the text in 1-3 sentences?
<bot>: My father has been seeing another woman for over a year and the guilt has finally caught up with him. My parents have never been this emotianally ruined before and I have no idea what is going on.