Gaining

Mate, prepared to be flamed like you've never been flamed before, and deservedly so I might add.

From the Guide to FF:

A miserable woman is NOT sexy or enjoyable to be with. The best part of being with someone gaining weight is to enjoy their gaining with them.

A: The so called "secret" feeding is foredoomed to failure, because every conscious person will notice when their clothes get too tight.

B: She will resent you for it if you try, there's no way around it. Hell most feedees and gainers would probably resent it.

C: This could end your marriage, if you love your wife do you want to risk that?

And,

D: Not only is this immoral, it's just plain stupid. Don't do it, it won't work.


Alternative.

Talk to her about it. There's a chance that your wife will welcome the idea of not having to worry about her weight.