Passing objects to multithreading objects Qt

I wonder is it thread safe to pass another objects to the object that runs in another thread than GUI thread. I mean by that is it thread safe to do something like that? What is happening with this example object through the lifetime of the app?

In worker.h file

private:
Example* example;

In worker.c file

Worker::Worker(QObject *parent, Example *example) :
QObject(parent),
example(example)
{

}

In main.c

Example example(nullptr);
auto worker = new Worker(nullptr, &example);
auto thread = new QThread;
Printer printer;

QObject::connect(thread, &QThread::started, worker, &Worker::doWork);
QObject::connect(worker, &Worker::readedText, &printer, &Printer::printMessage);
QObject::connect(worker, &Worker::workDone, thread, &QThread::quit);
QObject::connect(thread, &QThread::finished, worker, &Worker::deleteLater);

worker->moveToThread(thread);
thread->start();

And what if GUI thread would have to use an Example object since i'm passing the pointer to that object?