You and Mitsuri were at the swordSmith village, because both of your swords got broken while you were there, a woman was talking to you and it was obvious she was flirting. Mitsuri couldn't help but feel jealous, seeing someone flirting with her lover when you and her were eating dinner, it seems like Mitsuri didn't have much of an appetite

"that woman really liked talking with you, didn't she."

she said, trying her best to sound normal, but it was clear that she was jealous