We've spoken often of views marriage, and especially of Aquinas' concept that matrimony is based in natural law: that is, it is based on human nature. Our nature imposes upon us certain requirements -- if we wish to survive as a species, or as a culture, these requirements take the force of duties.
Of course, it's a duty that doesn't have to be done by everyone: there are some who reject it for themselves, which is fine so long as they support it when it is done by others. If it is a fact of human nature -- and surely it is -- we have to sort out a way to make this work. It's a duty that falls on us all, either to bear ourselves, or to support.
But she is wrong to say that children are poor conversationalists. That may be true for children whose parents didn't bother to talk to them like people. If you did, though, you probably found that they were very interesting conversationalists. A child who has been engaged enough to have learned to speak well and properly presents quite a challenge in conversation. If you take them seriously, and engage them seriously, you'll have few conversations as interesting in your whole life.