Hi MrSanRamon,
The Aurora uses their higher density 7.2 lb memory foam which can take a little longer to break in. Many people that purchase one of the Tempurpedic mattresses that use their 7 lb memory foam for example will tell you that it took quite a number of months to reach the softness level that they expected.
Post #2 here also has some suggestions that can help with a new memory foam mattress that is too firm.
In the case of most of the Select Foam mattresses … you can also remove the wool fire sock which will soften the mattress. Have you tried this?
Phoenix