if (teacupTarget == -1)
    teacupTarget = obj_teacup;
with (teacupTarget)
{
    if (other.rideEnd == true)
        endPos[other.partyMember] = [other.x, other.y];
    else
        startPos[other.partyMember] = [other.x, other.y];
}
instance_destroy();