spousal support

My wife retired in 2012 and started to get her SSI benefits while  I continued to work for a local government.  I applied for SSI spousal support and got  SSI payment at age of 65 in 2015. I retired last year and is receiving my own pension from the local government pension plan.  I am still being paid the SSI spousal support.  I am not sure whether I am still eligible to receive spousal support.  I don't want to get the money if I am not entitled to because sooner or later I have to pay it back.

Please advise.