Yes, occasional nightfall (wet dreams/nighttime urination) can become normal even after marriage. Just because you get married doesn't mean it will stop completely.
Nightfall is a spontaneous ejaculation during sleep, and it doesn't necessarily indicate weakness, infertility, or sexual dysfunction. Its frequency can vary from person to person, and there's no set "normal number."
If nightfall occurs occasionally and you don't have any other symptoms, there's usually no need to worry unnecessarily. However, if ejaculation is accompanied by pain, burning, blood, unusual discharge, or if nightfall is causing significant discomfort, it's wise to seek appropriate advice.
Share information about how often you experience nightfall and any other symptoms to better understand the cause.