Could be....In that case they would have responded using Heavy artillery and mortar or even their antique M109s (if deployed in the sector) and targetted one of our Brigade or Regimental HQs.
Sending a PAF jet suggests an attempt to be seen to be "avenging" something bigger that had happened.
It's all about proportions.
But then Pakis are not known to be so balanced and judicious! They never claimed that their nukes would only be in response to Indian nukes, right?