He could have offered to take the role as her brother's guardian instead. But, because of his motivations, he swooped right in. Now, everyone may gloss over this fact if she refuses. Alicia has been put in a position where it is quite difficult to say no. She may want to refuse but Ares has made it clear he holds the winning deck in this round, pitting his desires against her protectiveness of her brother.
Everyone says they can't wait to see Edith's face. I, on the other hand, want to see Kai's reaction. As much as he idolizes Ares, he has an underlying sis-con. He may whip out a "over-my-dead-body" before anyone else can react.
I totally agree with you and now that you mention it I want to see Kai's reaction too
Omg I actually thought Kai would be like mad at Alicia bcuz Ares is proposing to her (a.ka. her 'stealing' him) but this honestly could be a possibility XD can't wait! Ｏ(≧▽≦)Ｏ
There's a high probability that she's going to refuse.