The moment he made a distinction between both over their genetic make-up.
Cue what I just said about factoring genetic make-up into this. That's missing the point.
Given Cyclops' friends showed-up last issue to try and take away her son, she's excused.
Blame the mother all you want, the X-Men caused this incident with their actions in issue #1, so yeah, they better collaborate with the parents in finding their children regardless of them being mutant or not, it's on them.
Sue has every right to be angry at Cyclops and his friends over this.