They don’t really want it limited to 2 people, or even just adults in the long run.
They want it reduced to gibberish. In the long run, they don't want families to exist at all ..... certainly nothing resembling a Judaeo-Christian "family".
It's the father-mother-family cluster that outs them as the pervs, the outliers, the deviants. That's why they want it all to go away, and this court case is their grand, final attempt to legally rewire reality out of existence.