This is something really old that my grandma use to do it with some modifications, made by me. Even my parents believe on this shit .Think is a really good routine and has been tested, a lot of ppl asking me to this shit.
You need for this a ring and string (any string) you can use a hair of her if the ring is too heavy. and the hair cant support her ring you cant say” Guess you are going to be old women with a lot of cats gz!!!”
Start with the mambo jambo crap that you can you can predict her future, and see how many kids she will have in the future. If she agrees
You: Give me that ring!( well all my girl friends have rings)
Her : Ok!
You: Can you give a hair?
Her: OK
You: Hope you washed (smirk).
Her: (whatever)
So after you have the hair and the ring you want the make this necklace.
You: Stick your right hand palm up (good time for kino you hold with your left hand, and the right hand you put the improved necklace on top of her hand without touching ofc.
The routine itself, you have to watch the movement of the ring. If the ring spins itself is a girl, if he has clockwork movement it’s a boy. You do this separately you do the first time, and watch the movement. You reset you take the ring and softly put again in her hand, and watch. if it stand still or go anti clockwise its done she wont have more kids.