Your or your spouse’s participation in an employer-sponsored plan does not affect your eligibility or ability to contribute to an IRA. It only affects your eligibility to claim a deduction for a contribution to a traditional IRA. Therefore, your spouse may contribute to a Roth IRA on your behalf.
The term ‘spousal IRA’ just means
QUOTE
a description of how a person with little or no income qualifies to contribute (or have contributions made on his behalf).
Some financial institutions will flag or designate the IRA as a ‘spousal IRA’… if you have an existing IRA, your spouse may deposit your contribution to that existing IRA.
Since you are not an ‘active participant’ you are able to claim a deduction for your traditional IRA contribution. If your wife is not an active participant, she is also eligible to claim a deduction for her traditional IRA contribution (should she decide to contribute to an IRA), because your joint modified adjusted gross income is less than $150,000.