In normal condition it's surely unnecessary, but in her case, Rachel knows Noah already set his eyes on Alicia so I think it's her way of saying "you still can love her even if you're marrying me"
Thank you for the translation
Oh my what a ride I cried so hard at the chapter when Jinta-chan came back
I really thought Tokoyo come after him in the heaven
So glad it's a happy ending, they deserve it after all they had to go through