My half sister - twin ... no way

well after like 16 years[im 16 lol] I’ve known I had lots of step sisters but the one that was a wierd one was my half sister who lived in the same county[no nt country county] as me,and I knew of her and seen her before but she never new me.my mum didnt want me to have any contact with her because she hates the mother like they had runnings years ago.

so anyway we hooked up on msn latley and I revealed who I was after an hour.and my mum knows but isnt happy about it because her mother is very devious and thinks that the half sister could be to.

but anyway we have everything the same,we know some people,we have same thoughts watched the same programmes without each other knowing,both have ssame idle’s.& lots of strange little things and we have the same period dates. Wierd or what..and we both know the same information about our other family.and were only 6 days arpart[she went to the school I live outside,n she lived in the house I lived in years ago kinda] how does this all work out same genes? bt apparently she looks like me,but we look the same in nursery photos,but I dout we look alike as I look like my mother and only have the same eyes as my father. how is this