depends on how close me the sibling are.

yes

yeah it would bother me.

depends on how close. I'm not close to my half-bros and I couldn't care less on whether I'm invited to theirs or their invited to mines

if its my immediate sibs then yes... i wasnt in my halfs wedding, but didnt care cuz we're not close

immediate yes.. cuz we're all kinda close.. half? no ... step sis no.