[B/S] My brainy sister doesn’t have a lot of time for me anymore, but she really knows how to make it up to me! -- source link
![[B/S] My brainy sister doesn’t have a lot of time for me anymore, but she really knows how](https://64.media.tumblr.com/46fcad11ddec4b4b82bdbcf09727c393/tumblr_oxzfxwFpGD1wul0kco1_1280.jpg "[B/S] My brainy sister doesn’t have a lot of time for me anymore, but she really knows how")