Don't let family members drag the person's arm while the signer is grabbing the pen. If the daughter moves the signers arm around, then it is the daughter signing for the person. If the signer can't sign on their own, the signing is off. You can do a signature by X
if you know the procedure. However, the family members may use their arm as a fixed brace, so that the signer can have some physical support for the signing. Make sure the family members' arm doesn't
move around to assist the signing.