you don't have to have a love potion for a v3. I've never had to use mine. just keep connecting them by choosing "present" and after they have the 4 hearts for each other, connect them a few more times. as long as they are adults and almost 5 yrs old, they will have a baby together. like everything else in the world, you just have to "wait for the right time". you can try in the morning, and if that doesn't work, try midday, then evening. if they are both almost 5 yrs old or more, it will work. just remember to use the "present" selection and keep at it.
good luck!
Kyliesmum