It is more than likely that the memories she has of her mother are based on her foster mother, the queen of Alderaan. Plus with her having force capabilities & not knowing it, any feelings or memories could be amplified or altered by the force. For instance, how could she say that she knew her "real" mother was beautiful without actually seeing her in person? More than likely she was shown pictures of her & the feelings she spoke of to Luke were what she felt having seeing those pics. All in all, them being touched by Padme really has no bearing on their connection to her. Remember that Luke states in ROTJ that he has no memory of his mother, so her touch is of no consequence. Just dramatics. The strongest connection is between brother & sister as we saw in TESB.
Now rest your head my child.
