Advisor suggesting my marriage may cause problems in Postdoc position search
By suggesting that you prepare for questions about how your wife will like living in a new place, it seems to me that this advisor is actually trying to help you in your job search, not sabotage you. Even if you only interview in countries where this question is illegal, people who interview you may ask the question anyway (perhaps out of ignorance of the law), in which case it's usually best to answer. And even if they don't ask that particular question, the issue may come up as a result of other questions. I could be wrong (you know him better than I do), but if your advisor wanted to sabotage you, he wouldn't be going to the trouble of arranging mock interviews and confronting this issue head-on.

The letter of recommendation seems to me to be the more critical issue here. I think it depends on how your advisor became aware of your family issues. If these family issues have affected your work, then your advisor may feel he should mention it in the LOR.