If this means they're getting a divorce, and not just separating to, say, shop, breis.focloir.ie says that you need a little more. Their examples were (for separated):
d'fhág siad a chéile and scaradar a chéile. So, putting these into present tense, with this sentence, we'd get Fágann mo thuismitheoirí a chéile or Scarann mo thuismitheoirí ó chéile... Really, the ó chéile is needed to make it mean they divorced.
While it is normally used in the past tense, "scar" can be used as an intransitive verb.
Unless you are Brad Pitt and Angeline Jolie you can't separate habitually without actually getting back together again. It might be grammatically well formed but it should still make sense. These sentences are supposed to help people they shouldn't be this confusing. & There is no research to prove that ducks don't read newspapers, they just prefer comic books.