MADDI I LOVE U!Ur my older sister and u rock! ! U are just AMAZING THE WAY U R! "oh la la" Love u Hun 
Ooh la la  lawl, I lovers you  (see what I did there) Lexi, you're an amazing girl. It's an honour to have you as a little sister.  xoxo
You may have the awesomest big sister. But I have the awesomest little sister. Even though she steals my words  no I'm kidding  ..they're "our" words.
Spamming it with love  Instead of complaints about silences. It's good to have a change every once in a while