Yes. On a Joint return you have to report all your income for both of you. If you think filing separately would be better, it won't. Then she would have to file her own separate return and all he SSDI would be taxed.
Up to 85% of Social Security becomes taxable when all your other income plus 1/2 your social security, reaches:
Married Filing Jointly: $32,000
Single or head of household: $25,000
Married Filing Separately: 0
Try going to the search box upper right and type in SSA-1099 or Social Security Benefits. That will give you a Jump To link to take you directly to it.
OR
Enter a SSA-1099, SSA-1099-SM or RRB-1099 under
Federal
Wages and Income tab
Then scroll down to Retirement Plans and Social Security
Social Security (SSA-1099. RRB-1099) - click the Start or Update button