Holy cow, Avery and Elle have my heart!
They aren't mother and daughter but I see the motherly love that Avery has for Elle.

Avery has a very tragic past and she's still not over it. When the widower she's dating proposes, she says she can't and runs back home, she inadvertently brings his daughter Elle with her.

As Elle is whiny and Avery is dealing with so much, they will squabble and push each other's buttons, but ultimately come to understandings between themselves and about themselves and their lives. 

You will want tissues at the end!