It seems to me that my W favors my son. D gives her the cold shoulder on just about every front. W seems to try and connect with her in whatever capacity she is able to right now, but D just won't have any of it. S questions Ws decisions often, but doesn't cold shoulder her. I think that's why she seems to favor S.
Regardless, I read that too about having a favorite child during this and it seems to ring true.
I hope your Valentines day was good, all things considered.