I used Melon Mambo for the background as her favourite colour is pink and I also used the retired Wood Textures DSP as I think it just means outdoors.
I have shown the inside of the card on the right and the envelope that I made to match is shown below.
I have also included a photo of her invitation that she designed. The colours and shapes for the card front were very specific. Unfortunately I do not have a stamp of a manicured hand (that she wanted) but I found sheets of stickers that fit the theme and she was happy with them.