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Hayley was originally matched with farmer Matt Trewin on the Channel Seven show, but he broke up with her before the finale, which aired last month.
She went on to briefly date Will, 39, and became pregnant with his child, but they broke up after she told him she was expecting.
Stunning: Hayley couldn't wipe the smile off her face as she cradled her growing belly while posing for a series of photos shared to the Melbourne salon's Instagram
Bombshell announcement: The reality star announced that she was expecting her first child with her ex last week. Hayley and Will had a short-lived romance after the FWAW finale was filmed in December - and after he'd split from his winning contestant, paediatric nurse Jaimee