My sims, Ian and Paul, have three kids: Pia (teen); Pan (child); and Nial (toddler). I like both of the boys and can't decide who should be heir. I aged them up in CAS for a sneak peek so they will...
Thanks for voting @jillbg :) It looks like Nial was the most popular and I think I might have been leaning that way anyway. I added future partners for the boys after I saw Nial was way ahead so, unless I go back to an earlier save, I need to go ahead with him because I could never play a male/female couple ;)