Thanks again to Gransnet and to Sarah Haywood. Another happy reader here 
First of all, as others have already said, while you can’t judge a book by its cover, this one certainly deserves a mention: a beautifully produced hardback, a joy to hold and read. I love the blooming cactus artwork and the attractive calligraphy. Well done, Two Roads.
As for the story, I didn’t immediately take to Susan: she comes over, at least initially, as judgemental, intolerant of others’ failings and apparently lacking in any warmth or humour, although I did like her independence and determination. As the story continues however, I was drawn in and, eventually, warmed to her and grew to care that all should turn out well for her.
Overall, I found The Cactus to be a funny and insightful story, well written, imagined and observed. It is also a deep, sometimes dark depiction of sibling rivalry, changes in society’s acceptance of teenage pregnancy/unmarried motherhood and the hopelessness of thinking you can control everything in your life.
The supporting cast is well written too: Kate the neighbour, who had a lot more to her than Susan suspected; Rob the gardener, whose persistence was admirable; the awful Aunt Sylvia; Richard, a male version of Susan.....but for whom I did feel a pang of sympathy, as he was so effortlessly replaced by Rob.
One niggle: others have already commented on the use of the word Mom. It jarred a bit with me too. And, while I was almost persuaded by Mapleleaf’s explanation (Birmingham pronunciation), the first time it was used was by Tom (p.7), a new admin assistant in Susan’s London office....?
Finally, quite a few similarly impressive debut novels have featured in the Gransnet Bookclub of late. Many of them, as with this, arose out of Creative Writing courses.
So...I’d like to ask Sarah what prompted her to decide to quit a legal career and write a novel?
And what impact(s) did her Masters have on her writing?
I'd also quite like to find out how Susan copes with motherhood so hoping there might be a sequel at some point?