Two women who looks alike, born same day shared same mother but both are not twins, how?

Question

I was walking through the park the other day and I saw an old man sitting on a bench. He was accompanied by two young women keeping him entertained. Lucy and Maggie Fletcher were their names.
Now, there was something peculiar about these two women. They wore completely identical clothes in addition to looking alike in every other way. They were the same height, had the same eye color and the same cheekbones. They were indeed born on the same day and shared the same mother. Yet, they were not twins. How can that be?

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Answer 1

I think the ans is : they are two of the triplets.