why does she have a stalker (we will call it a stalker) is it a male friend your not ment to know about and she has dumped him from a great hight ? (we hope not)
thats a huge assumtion, and at a time when the op's wife needs most support not suspicion, who knows why someone decides to behave like this,it could be he likes her shoes or she has snubbed his flirting in the office,
the OP's wife is a victim regardless of the reason and so the op needs to be supporting .
im sure it is a stressful enough time for the two of them without anymore crap to add to the pot.