Probably not, OP.
If they were allowed to do so, the rights of the first mortgagor would be ignored.
They can probably, at most, put a lien on your home.
They could also obtain a judgment against you.
I suggest you communicate with them and try to work something out.
One last thing, my above answers were predicated on your 2nd being on the "up & up".
If there are some inconstancies or discrepancies, all bets are off, if you get my drift.