Could you make a port or re-make the mod from Skyrim that let's you give gifts or anything to everyone. It's supposed to increase your relationship stat with people. And you can give your children any gift like gems but if you gave them crap they didn't like it. At least from what I remember.
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http://www.nexusmods.com/skyrimspecialedition/mods/1889/?
this one is pretty good, not included?