Sharing my account

Hello guys I want to know something me and my sis love to play League but in my account have champs and skins she don't so she usualy plays in my account we have opposite play style (i'm more aggressive and careful and she's more passive and clumsy) i would like to know if i can be banned for leaving my account to someone else. PS: _**She only go normals and ARAM**_
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