Even if your wife does not like public displays of affection, sometimes a little PDA can go the long way.
My wife does not like PDA. She does not like it when she experiences it and she does not like it when she observes it.
Frequently when I have tried to express my affection for her in a public place I have gotten shot down.
But occasionally, I have hit the PDA jackpot. For whatever reason: the position of the moon, the proper alignment of the stars, a brief prayer that got answered, I have gotten acceptable PDA in.
If you stick the landing on PDA in a classy way sometimes it will evolve in the, "hey we should go home" look.