The max score you can get from IELTS with a spouse in 128 ( 32 * 4 )
In your case considering your spouse IELTS score is contributing 106 points (L 16 Points R 29, W 29 and Speaking 32)
So basically there is a huge room to add another 16 points from Listening and 6 points from reading and Writing. A Grand Total of 22 points. This will take your score to 428.
Both you and your wife are at CLB 7 If your spouse score goes to CLB 9 or higher
( 1 ) 25 points added under Skill transferability factors section a Official Language proficiency and education
PLUS ADDITIONAL
( 2 ) 25 points added under Skill transferability factors section a Official Language proficiency and foreign work experience
Effectively this add to your score of 406 an important 22 points from IELTS and another 50 from derived effects of a higher band of IELTS. This will take you to 478
Yup, that’s right you moved from 406 to 478 in a flash only if primary applicant manages a better IELTS score.
Hope this helps.
PS: I have assumed the age of primary applicant as 29 years.
The Primary applicant needs to score at least L-8, R-7, W-7,S-7 to claim maximum points. One of you may write IELTS again and get atleast this score. You will get additional 50 points for skills transferability.