After waiting 15 minutes, Kiri said the moon appeared and they put their plan into action.
"Luckily it was a still night so I could shout up to Lachie whether to go a little left or right," she said.
"We timed it perfectly to get this beautifully centred photo of him in the moon."
A supermoon occurs when the full moon coincides with the moon's closest approach to Earth in its orbit, making the moon appear a brighter and closer than normal.
Kirk said it is not just herself and Lachie who are into photography.
"The whole entire family are all into photography on a big scale," she said. "Lachie's speciality is night photography and is looking forward to getting some Milky Way photos.
"My speciality is taking picture of people, while my husband is a lover of landscape photos. The other kids love a little bit of everything.
Kirk added: "We as a family have many more photo planned of what we'd like to capture next."