Here is how you describe PF, a murderer: Trapped (we don't know this), responsible young man (we don't know this), caring for a disabled parent (we don't know this), did not duck his responsibilities (we don't know this),
he was co-parenting with a woman he's never lived with, He was trapped between two women and two lifestyles (we don't know this)... And to boot you say Kaylee might not have been his kid and imply he's raising another man's kid...
He is an adult man, who could have made any decision, but instead he chose to murder the mother of his child. And you are here sticking up for him, and blaming Kelsey.