Very interesting, Donna! Thank you for sharing this interesting information.
These are called punna iddhi, which basically means (moderate) supernormal powers that certain people get at birth, due to previous meritorious deeds.
They can vary widely. Some with such capabilities can see living beings with fine bodies, such as devas or gandhabbas (They ususally call them ghosts). Some can get one’s own gandhabba to come out of the physical body (this is called astral travel, and is more common). Some can remember previous lives, etc.
But this is the first time I heard about being able to read the whole stack of cards another person is holding, just by the person holding the cards look at just one card. This is more complex than the above cases that I mentioned, because this involves two people.
The only case I know something like this is the abilities of Waharaka Thero. I have not met him, but he has mentioned some cases in his desanas.
Basically, one’s “mano loka” (mind plane) can be accessed by oneself only. As one’s mind is purified, one’s ability to remember things gets better. Then at some point, one may be able to see many lives in the past.
The ability to access another’s mind plane is harder. You said the women in your family can do this. So, any given person has this ability? Can you also do this if a non-family member is holding the cards? Any other information would be good, only if you feel comfortable.
Furthermore, is there any difference between your capabilities and any one of those family members?