I guess after years of Kaede neglecting him physically and emotionally Makoto finally fell out of love.
For many people connection followed with understanding is the catalyst of attraction, it's something that's easy to lose and hard to find. Probably why Makoto felt more interested/attracted...
The development we've been waiting for... Makoto finally discussing things with his wife.
But I wonder what will be the reaction of Michi when she finds out that You-chan only acts like that because he cheated.
I have so much hope for this manga. It started good but lacks character depth. Should've delve more on Sa-chan's character, than showing multiple chapter of Kyo in despair. This manga had so much potential in the first half, sadly