Hi I am looking for yaoi mangas similar to Ani no Senaka. thank you

You mean in love with family members partner? Or particularly in love with sister's husband? Just in case, I am posting both so you can choose from there -
http://www.mangago.zone/read-manga/suki_ni_naccha_ikenai_hito/mf/v01/c001/4/ (in love with sister's fiance)
http://www.mangago.zone/read-manga/kawaii_hito_pure/ (in love with sister's ex-husband)
http://www.mangago.zone/read-manga/ani_no_senaka/ (in love with sister's husband)
http://www.mangago.zone/read-manga/sumanai_masumi_kun/ (in love with wife's father)
http://www.mangago.zone/read-manga/follow/tr/123637/page/12/ (in love with sister's husband)
http://www.mangago.zone/read-manga/love_skit/ (in love with sister's husband)

http://www.mangago.zone/home/mangalist/213/

thank you

Hope you find some manga you like. (｡^‿^｡)