I tried putting Baby Boost on the mother and father, twice on each. So $2000.
And... I got 4 single kids in a row, and they took exactly 11 tries to get the 4th child.
So, 7 failed tries with 4 baby boosts.
Also, I've never had twins or triplets so far.
So basically, I'm not a happy bunny.
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-Emm