Circling back around to before the nitpicking really started, the only real obstacle standing in the way of Newt being hugged was the previously established minimum duration of embryo implantation. We had to bend over backwards to explain why it couldn't be her and had to be Hicks, why the facehugger inexplicably gave up on her, etc., etc.
Covenant changed that rule. Yay for Covenant. Ridley Scott just inadvertently fixed a plot hole in Alien 3. Yay for Ridley.