
it wasn't to please her per se. her mom was otw to accept him because she wants her child to be happy. but kirino didn't want to put her mother through the pain of knowing she wont have a grandchild and also the pain of knowing the fact that she probably felt like she didn't know her child or that she couldn't make her child feel comfortable enough. kirino chose her mother just as her mother chose to understand him at the end.

Yeah, but he does truly love his child, so he is happy in a way. ***head canon time*** Kirino, while not unhappy, learns to to accept his fate of a closeted gay man. He loves his children more than anything. They bring joy to his world. Wife (sorry woman i don't know) cheats on him with her boss. Maybe saying Kirino never truly loved her anyway. Takes off leaving Kirino with the kiddos. (So tropey and cliché i know) Kirino, while traveling for work, runs into a bara man who is a professional and outwardly gay. Rocks Kirino's world and chases his pretty ass to the sticks until they end up together. Bonus head canon, Kirino and his partner, run into Mishima and Yumeno.
Someone love kirino please.