My situation isn't quite the same but similar. I clicked "me too" so apologies if this should fall under a different thread. Until yesterday, the sentiments haven't been a problem and actually kind of cute. However, when I added a toddler for my two dads, things have not gone so well. The toddler was sad about a potty accident. When one of the dads tried to comfort him, the toddler got the hurt sentiment and is now almost always angry or sad about it. It's been at least one or maybe two sim days and the sentiment lingers. First, it seems silly this toddler would get a hurt sentiment from simply not wanting comfort (especially since he's "fussy" and should like the attention). Second, I don't understand why this supposedly short term sentiment should stick around so long. Thanks for letting me vent. I hope someone has some advice about this.
Update: I went through almost a whole sims week, trying to rid the toddler of his hurt sentiment. I separated him from the dad who hurt him for around 48 sim hours. Then I tried having the dad talk to him and play with him, in an effort to generate a new sentiment. Nothing worked. I got super frustrated and ended up removing the toddler and adding a new one. I seriously hope someone can somehow fix this.
Second update: Another "hurt" sentiment when one of the dads tried to calm down the angry toddler! Perhaps there's a cheat to remove these irritating, seemingly random yet powerfully debilitating sentiments, especially from toddlers. Not only do they get the sad moodlet, it also diminishes positive moodlets. To have a toddler constantly saddened by the mere presence of one of his parents is pretty much ruining my experience with this game.