Has your wife been tested to know that she is negative for HSV 1? If you’ve been married for 15 years and she doesn’t have it, then it suggests that you are shedding virus very infrequently. Or she could have given this to you through oral sex. I would suggest that if she hasn’t been tested, she should be. And remember that the IgG test misses 30% of HSV 1 compared to the western blot.
what you do about transmission is up to both of you. HSV 1 genital infection is rarely an issue, so that should influence your decision. You could take daily antivirals and have regular sex and the risk is very low but then it’s very low already!