Quick lesson in existentialism: we are responsible for all our actions and choices because we are free. So although I'm only a qualified existentialist, I think Rika chose the want to have her own child over her romance. She totally could have gotten vitro fertilization or simply have chosen Kiyoka over the want for kids. Quite selfish on her part. If she did in fact have real feelings for Kiyoka she would have found a way to make it work. Do some research. Adopt a kid. Vitro fertilization. Whatever the case.
By the same token Kiyoka gave up way too easily without even trying to figure things out (as far as we can tell), and said something quite harsh to Rika in the shop there.
I'm not feeling it everyone, I'm sorry. I don't really find this that cute or heartwarming. I'm happy for Chiaki and how Kiyoka helped her figure things out for herself and how her friend is being supportive of her decision, but the deal with Kiyoka and Rika just puts a major downer on it that I don't like.