Maki should dump her, but slap her face, she would do that if she knew that Liz and her ex slept together when Liz was in relationship with Maki. But probably...
1.Maki will kiss her there
2. Slap Liz ex in face(not gonna happen probably)
3. Maki will forgive Liz after she apologize(i hope will)
Anyway so far Maki is more mature than that stupid girl, and author will give some cliche end to this scene. Liz need to do something with herself