I bought (and built) my wife the two rose set for Valentine’s Day - she thought it was most amusing -tbf, she got some stuff from Lush as well.
I was thinking about the bunch for our anniversary next month, but on reflection, some jewellery might be more appropriate - something centred around a ruby. **
Lego sets often have a few “spares”; IIRC, Titanic had about a dozen spares ( in around 9K total bricks!). However, I don’t recall the Wildflower set having more than half a dozen spares, so twenty would suggest a reread of the instructions.
Anyway, with the spares, you start a stache, get onto bricklink & rebrickable and start building MOCs (My Own Creations). And thus, a passing interest becomes a full time hobby! (Worse than bl00dy hifi & photography, but maybe not as expensive. Unless you wish to recreate the Forth Railway Bridge, a topographical map of the Lake District, or an Airbus A380!)**
**all of which can be found via Goggle…at around 40K bricks a shot! Astonishing and beautiful. Especially the A380!
Don’t bother starting small, go big! You definitely need a Titanic.
On a serious note, it sounds like you and Mrs VV have become converts, it’s a great stress buster and a nice way to pass the time with something to share at the end, Enjoy