Mechanics to represent twin intuition?

I have 2 players who will be playing tabaxi twins, they have a really good backstory and have asked me is there is a way they could have some sort of a link, so if they are not together and one is in trouble the other has a chance of knowing something might be wrong.

I am considering a simple perception check, setting the DC based on events and the strength of emotion the one suffering is feeling. But are there any in game mechanics that could be used to replicate this, am looking for specific rules or feats, low level spells and magic items that I could give the players to replicate this.