I’m a bit confused how the mom is taking this information so well since Mirai actually told her the truth. Did they just pass it off as a joke and go with that excuse they came up with? It seems like that to me since she doesn’t think Nozomi is actually Kako’s daughter but I’m not sure.
Yea, the implications of her words about how Mirai has gone through ' a lot' at her age is meant to be that they told her the actual excuse off screen and she accepted it because, well
Is this the part where I have to remind you that two cis girls can't have a baby together?
Even Kako herself doesn't believe that Nozomi is her daughter.
This. Yea there are ways for Cis Homosexual couples to have kids, but they all require at least one third party and they would leave the child biologically as either Mirai or Kako's. Not both of theirs like Mirai claimed.