Lindt cafe gunman Man Haron Monis was "perfectly prepared" to put his lover Amirah Droudis at risk in his bid to have his ex-wife killed, a prosecutor says.
Droudis, 37, has pleaded not guilty to stabbing Monis' former partner multiple times and then setting her body alight at a western Sydney unit in April 2013.
In the crown prosecution's closing submissions at her trial on Thursday, Mark Tedeschi QC told the NSW Supreme Court that Monis was "quite prepared to place (Droudis) in extreme danger for his own selfish purposes".
This included creating an "elaborate alibi" for himself - that he was out with friends and then in a car accident when the killing happened.
Droudis later gave the alibi that she was at her parents' place helping her ailing father shower at the time of the murder, he said.
The fact that Monis instructed Droudis to pour petrol over his ex-wife's body was unnecessary given she had been stabbed 18 times, the crown said.
"He was perfectly prepared to put this woman at risk of her life, of being caught ..." Mr Tedeschi said.
"His so-called love for her was completely based on what he could get out of her."
However, the crown alleged Droudis was willing to do Monis' bidding and said she engaged in multiple "contrived conversations" with him designed to mislead police in their investigations.
The prosecution said witnesses of the attack at the Werrington unit had not been able to identify Droudis in a line-up but had provided physical descriptions - chubby, olive-skinned, medium height - that matched her appearance.
The prosecution is expected to finish summing up its circumstantial case against Droudis on Friday with the defence due to finish next week.