The $37,000 limit indicated by TurboTax is for the $27,000 employee elective deferral and, in this case, $10,000 permissible employer contribution combined.
No, your spouse is not permitted to have a SIMPLE IRA when your spouse has a self-employed 401(k). The $10,000 employer contribution, if your spouse makes one, is made to the same 401(k) account as the elective deferrals. Refer to the documentation provided by your spouse's 401(k) plan for making contributions.