Amelie didn't avoid Davie, rather Davie avoided Amelie . Amelie noticed this and in the seventh chapter, Davie was standing on the roof of the house talking to his girlfriend or wife on the phone and Amelie and MC heard the matter. Now I want to see everyone in the family including Davie know about the sex between MC and Amelie and it will also be proven that Davie has another girlfriend or wife. In this way, none of Davie and Amelie will have the courage to protest and MC will have fun by having a sex marathon with Amelie and her daughters and MC will profit by falling in the middle.
To be honest, after Chapter 7, when Amelie and I overheard her husband's conversation (presumably with his lover), the plot stopped... yes, Davie is most likely on "vacation" now, and therefore we cannot now prove (photos/videos) how Davie is cheating on his wife, but I hope, besides sex with Amelie in Chapter 11 (I hope this will happen), there would be some progress in the plot, for example... Davie leaves for work again, then Amelie calls Davie, and either some woman picks up the phone and says that Davie is not here right now (or he is busy right now), or Davie picks up the phone, but in the background, Amelie hears a girl (who is probably doing various dirty things with her husband right now).