Women get psycho about kids so you can't listen to her. Her logic is skewed.

If you don't want kids then DEFINITELY DO NOT ADOPT. Having a kid means sacrificing your life. If you aren't fully willing to make that sacrifice then do not do it. Period. It is unfair to the kid.

If your wife is that psychotic about getting a kid she will undoubtedly form an alliance with that child AGAINST you. Hear me now and believe me later.

If she won't let it go, then kick her ass to the curb. Regardless of how much you "value" your marriage. If she can't listen to logic and reason then it means she is broken. Trade her in.