As to be expected, things started to change over time. She told me that she wanted space to herself. So she decided to spend more time in her own room. In truth, this was just a way for her to spend more time with Alex, without actually having to tell me that that was what she wanted. When she made out that she was in her own room, she was actually in his. We all knew this, but it was allowed to go unsaid.
It did not bother me. I excepted that she had a stronger sexual connection with him, and of course it also allowed me to see who I wanted too, when I wanted. I took full advantage of that. Also, my wife* still spent plenty of time in my room, and we still had a very strong connection.
Her becoming pregnant was a bolt out of the blue.