He didn't stop her, did he? He never claimed the right to stop her. He has every right to express his opinion of her decisions.
Clearly that would be hard to do from a fine net site like Free Republic and I don't see how you would imagine it to be possible.
Having said that I would add that the sentiment on FR appears to be that we are all free to live our lives as we chose without un-necessary involvement from the government or society at large.
Clearly FR represents a conservative point of view that is pro-life,pro-family,very much in favor of limited government and in favor of people who mind their own knitting. In fact, I think Free republicans are so much in favor of the latter that they may even object to opinions that encroach, by word or deed, pre or post conception, on a woman's decision to become pregnant,give birth,care for and support her child.