Check out xialla.com - they make a silicone (thin) cock ring that fits snugly around the base of your cock, a second "ring" fits around your scrotum, holding everything tight - then there's a "tale" that goes up yr butt to an (optional) sticky pad. I can vouch for the ring's thinness which doesn't disturb the wife - key factor. Originally tried the thicker black silicone rings on amz, but those rubbed and were not well received

unless used on the shaft to enhance her pleasures

... The xialla company's service is quite amazing... they make three sizes of ring and will replace for different size at no cost