Thea has been painting for most of her life and was hugely influenced by her mother, Joan Darlow, a prolific watercolour artist in Zimbabwe. In October 2010 Thea's watercolours were exhibited at the SASA 104th Annual Exhibition and achieved the required points to take part in the SASA 2011 Merit Exhibition. In June 2012 she also attained the required points to exhibit at the WSSA (Water Colour Society of South Africa) New Signatures Exhibition. In 2014 Thea's work was selected in the top 25 art works at Vuleka Art Exhibition held at the Art B Gallery. After renewing her membership of SASA in 2014, she took part in the 108th Annual Exhibition. All three of the paintings she submitted were selected and she was placed in the top 12 point scorers at this exhibition.