Not wife, but i once dated a young lass who worked/volunteered for a catholic retreat. She was super religious to the point that we could never have been an item (for obvious reasons) but we dated a couple of times after being set up by some mutual friends. She wouldn’t really let me touch her, but she gave me an amazing hand job on the crowded dance floor of a city centre club.

Not sure which part of the bible allows that, but i wasn’t complaining ;)

I feel for you, mate. My wife is the same. Mine is so uptight she won't wear anything with an open neck lest it show cleavage.

Will your wife wear bikinis at the beach or pool with men around? That could be a socially-acceptable way of introducing her to the thrills of a nip slip. You both would have plausible deniability then.

I wish I had better suggestions.

Just a few ideas:
1. You might try encouraging her to go braless around the house. Once she gets accustomed to that, you might suggest she try coming to the door for deliveries, fetching the Post (getting the mail), or a friendly dare to retrieve something from your car sans bra.
2. Once she gets used to that, you might convince her to go braless elsewhere (darkly-lit restaurants, a night-time drive around town).
3. Always have her bring a light shawl or something to cover up with in case she feels too exposed. Make it a game, always with a safe way out (cover up with jackets or scarf).

For what it's worth mentioning, I've tried all of these with my wife, and failed miserably. I could seldom convince her to try. She tried a few ideas once with no one around, then adamantly refused to ever do it again.

If she is very pious...
 

... ...just tell her that God created man and woman naked and that no one should be ashamed of being naked.

And whisper to her during sex, just before she climaxes, how awesome it would be if other people could see her sexy too...

Dare her how proud God and you would be of her if she could overcome her shame in showing herself naked and it's good for her self esteem.

And if she absolutely doesn't want to be naked in front of and for others, you might want to try another girl...

unhappiness gap between reality and expectation
 

Why is she like this? - I expect she will say that she values fidelity to YOU - exclusively. So her doing anything deliberately to incite erotic arousal in another man is probably an absolute red line. Any suspected pressure/manipulation will probably result in pushback.

At most, she might just take part in genuine naturist activities - but only if she believes it is innocent and not erotic for other men.

She probably knows you well enough to see through any clever ruses and any "subtle serpent arguments" suggested here.

Happiness and unhappiness is the gap between reality and desire. If I make my happiness depend on having a top-of the range billionaire yacht - I will be forever unhappy.

Ponder what you already have regarding her love and fidelity towards you - which many men will envy. This is far more valuable and durable than this fantasy. Enjoy and develop what you have with her and you are more likely to have lifelong satisfaction.

You have a fantasy which you can mentally indulge sometimes - but remember it is only an ocassional fantasy.

/end sermon - agony uncle advice.

My wife is religious, but we have admitted to each other that our religious enthusiasm is draining us. We are believers, but becoming exhausted by expectations. After our kids left the nest a few years ago, she became more open to things that were previously "sinful" in her eyes: sex toys, dirty language during sex, occasional pictures (never exposing nips or pussy, but her ass yes) and even lightweight fantasy. She likes to imagine we are young and dating and that we have decided to "go all the way" during a church dance. I like to think the future is promising!

Not my wife, but a friend.

She has never sucked a cock, and thinks eating pussy is disgusting!

Perfect...
 

You are on the right track. Even a pious woman can be horny and shameless...

Well said!

The usher's wife body-shames your wife, but evidently it's all your fault?