The presenter, 50, appeared in good spirits while wearing a pink knitted hat and an orange polo neck as she posed with her son.
Beeny revealed that the pair were planting flowers in empty loo rolls in the caption, adding: “@_charlie_swift_ it’s just not that wierd [sic] a thing to do with empty loo rolls….. just you wait till all the flowers pop out…..!!! X
“Thanks to the wonderful @somersetwreathsandgarlands for the idea and lovely seeds - you’re simply the best!!! And @alpacamyhat for the lovely warm hat!! X”.
The Channel 4 star is mum also to Billy Rafferty and Laurie whom she welcomed with her husband of 19 years Graham Swift.
This is the second festive update the property presenter has shared on social media in recent days.
Last Friday, she posted a snap of herself smiling while lying on her stairs putting up some last-minute Christmas decorations.
The TV personality kept things casual in a green sweater and jeans as she decorated her bannisters with pine foliage and pine cones.
Alongside it, she quipped: “Trying to get most of the garden attached to bannisters…….!! X.”
Earlier this month, the 50-year-old reflected on her diagnosis by sharing a photo of herself sporting a woolly hat and enjoying an early morning walk.
Captioning the Instagram post, she said: “It may be cold but WHAT a beautiful morning!!
“One of my very fav hats I’ve been given and feeling human! You were right - it does pass…..!” (sic).
The property expert shared news of her diagnosis in August, and previously said that she almost expected to develop the disease after losing her mum to cancer aged 39.
Beeny – who is best known for her work on UK property programmes, including Help! My House Is Falling Down and Sarah Beeny’s New Life In The Country – told The Telegraph that she had began a course of chemotherapy to treat the cancer and had surgery.
At the time, she also shared that she was set to undergo radiotherapy in the New Year.