Comparing one's husband to one's brother

If a woman says to her husband "did you take your phone with you to the shower?" And the husband says "no why would I" then the wife says "my brother takes it" and the husband says "I'm not crazy like your brother". After the wife says my brother takes it she gets a little scared as she read online that comparing your husband eith your brother affects the nikah. She now is doubting if she was calling her husband brother or had any such intentions as she got scared and felt she had. She wasn't comparing she was just saying how a trait may have been similar. Has the nikah been affected? Does comparing your spouse to your brother affect the nikah.