Twin girl looking for mother, born in dec 3, 68 henderson gen, hamilton, ontario can

I am one of twin girls looking for bio mother who was about 20, i m mixed, mother is anglo saxon, father black, father is from texas and has twin boys only 6-9 months older then me, I was born in december 1968. I have also a sister three years older than my fathers twin boys. I understand my mother was interested in interior design and my father had his own business, breeded horses and liked gulf. He was also pro athlete when met my mother. One of my bio grandfathers was the united church mediator and my mother had a brother very close together in age and a younger brother.