Just me guessing here, but......Jan's threat MIGHT be to accuse John of attempted murder.
Since spoilers say Theo runs into old flame.......am guessing that would be Chanel, who quickly wants to move in with him, since Mommy cut off her money sources.
Theo lives with Daddy Abe, doesn't he? And he just came from Africa rehab, so really has no income since no job,. (yeah, the Salem money tree is always handy dandy)
Sami has devoted the past several years of her life, depriving her children of a somewhat normal childhood, raising them in Italy I guess, until they went off to boarding school, college, etc. & the payback is her marriage is in trouble. Do not misunderstand, I would be very happy if I never saw that husband again, I have hated that Sami ever was with him, (& I don't particularly care for her)...but will be interested to know the "WHY" she feels as she does.