This is both scary and pleasing. In chapter 52, Shamiko started learning from Foxey's sadism love, and now she is outright molesting Momo, or trying to.
Shamiko hasn't absorbed the fact that Momo has an almost pathological defensiveness against people suddenly encroaching on her. It may be a memory of whatever left the scars on her.
Gentle seduction is the best way with Momo. Momo is sick of the war. But her battle reflexes are rock solid.