In a statement announcing her departure, Heather Joyce described herself as "a reluctant Leader of the Council".
We have achieved a lot over the past two years and this has been an incredibly difficult decision but my husband is unwell and I have felt for a while that I need to devote more of my time to supporting him during a difficult period as well as turning my attention back towards by family and serving the people of Llanrumney.
I believe I stepped up to the plate as the Council Leader and leave the Council in a stronger position compared to when I was elected and am proud that during incredibly difficult circumstances we have managed to lay successful foundations that will serve the people of Cardiff well in the years ahead.
More top news
The cash windfall follows the announcement that an extra £20 billion a year by 2023/24 will be invested in health services across the UK.
The funding will help businesses in the sector improve their businesses before Brexit.
A new speed limit has come into force on major roads and motorways to help tackle air pollution.