"Allison, there are many questions that are unanswered, many pieces of a puzzle that need to be put together, and we your family pledge to you that we will have these questions answered," Mrs Fowler said as her voice began to crack.
We will bring you justice and you deserve nothing less.
"Why then? Why there? Why now? We cry, why did she die?
"The heavens are silent."
"Ashley and I would never have imagined that we would be standing here today reading this eulogy for our sister Allison, taken from us so tragically and suddenly," Mrs Fowler said.
"Our Allison has left this earth under such horrific circumstances."
Mrs Fowler said the family had been contacted by many people who had been in Mrs Baden-Clay's tour groups when she was a guide on Heron Island.
They had all expressed the same "shock, disbelief and sadness" felt by her family.
The pair spoke about Allison as a child with a love of dancing growing into a young woman with a penchant for languages.
They recalled after marrying Mr Baden-Clay, the couple had taken an extended honeymoon to South America and Switzerland before settling in London for awhile.
"She was a devoted wife, supporting Gerard in their partnership of marriage and she did so until the day that she died," Mrs Fowler said.
"Soon after they returned from London, Allison became pregnant and sacrificed her career and her life goals to be a stay-at-home mum for her beautiful children."
Mrs Fowler said though everyone gathered at the funeral would continue to live their day-to-day lives, they would do so with a void in their lives left by the death of Mrs Baden-Clay.
"A life so full of adventure and rich experiences yet cut short so tragically," she said.
"Our Allison has touched the heart of everyone she met and had a very loving nature that made her a friend to many.
"...a high achiever, a model mum and an unselfish soul, all of this was achieved under sometimes difficult circumstances."