The snails don't need another snail to reproduce. After 1 hatch, you'll have about 20 or more little black snails on your plants, filter, ornaments, and in your substrate. It is a pain to try to remove snails from plants and ornaments; a literal hell to try to remove from bog wood or substrate. The methods of removing snails are not easy, and whether you kill them yourself or not, you'll eventually have empty snail shells litering your tank.
just squish the thing now, trust me.