“Paternity is a legal fiction.” James Joyce. McKenzie sought to have Russo declared the legal father of her son, I.M. Russo countered, arguing both that the statute of limitations barred the suit, and that McKenzie could not sue on I.M.’s behalf, as he was over 18. McKenzie claimed she should be allowed to bring the suit “at any time” under CRS 19-4-107 because Russo held I.M. out as his son. She then sought to join I.M. as an indispensable party. The trial court granted judgment on the pleadings, holding that the suit was barred by statute of limitations, and that I.M. was not indispensable because, under CRS 19-4-108, he could bring his own suit before turning 21. The Court of Appeals agreed with the trial court’s legal conclusions as well as holding that CRS 19-4-107 only allows suits “at any time” when the parties were married or thought they were married.