I don't think that there is such a thing that Homura could do that would drive her over the "creep" edge for Madoka... if the scene where Homura breaks down crying in front of Madoka while holding her wasn't it, nothing is.
Loving it!! Although justice is blind so she is just giving Lucifer a wholesome smile.... But Lucifer is giving justice the 'look' (you know what I'm talking about