the coins locked within the multisig require dual signatures. thus its not all your property. you require the second party to sign too..
Correct. This, however, does not change the fact that no one can take these coins away from you regardless of whether the secondary party chooses to properly interact with you or not.
by the second party not signing. first party cant have them back, they remain locked. because it requires dual signing to release
by this i agree the second party cannot simply "take it from you" without your signature, because they remain locked, but you cant take it without theirs either
here is the point..
they can blackmail you to sign X over to them just to get an agreement. thus
taking it from you via extortion (they win)
or
locking you out of ever getting them back (no one wins, but second party feels good about screwing first party)