I use four such "custom facts". You could use only one or many more. The ones I use are:
_Link to Parent:
_Link to children:
_Link to Spouse:
_Link to Maiden name:
You could add more for just "other" or for siblings and whoever. I'm thinking of adding one for "other" but haven'd done it yet.
The underline makes this fact sort to the top in the arrangement of facts when alphabetical.
If I have more than one fact that link for one child, or different children, I enter additional facts for them.
Link to Parent: Death Cert names parents: John and Mary (Smith) Jones
Link to Parent: 80 yr old John Jones named father in 1880 census - in same household.
Link to spouse: Mg Cert of Jon Johnes and Mary Smythe.
Link to maiden: Maiden name Smith inscribed on headstone.
Link to spouse and Link to maiden are often not duplicative - ie usually use one but not the other.
I often go back to some relationships that I setup years ago and forgot how I put them together and have to try to weave through all of my sources to figure it out. I now put the reasons into these facts so that I can quickly see what made me put the various persons related to a person.
This is kind of rude and crude, but it works for me until something better comes along. Software sure doesn't help.