@Barry2021,
Why don't you ask her?
I would assume she had her nails done and her toes done - most women would for an event like this. A manicure can run (and of course the lowest prices are for the real cheap places that I would not recommend unless you really know them because their cleanliness can be suspect) for $10 - $30 and pedicure from $25 over $70 or more depending on the type of pedicure. So yeah a lot of people will do gel which raises the prices a little - the advantage of gel is the manicure will last a lot longer - the disadvantage is that they dry the heck out of your nails.
Also does your wife have acrylic nails? If so, that ups it even more.
So yes if you get a manicure and pedicure it very easily can be over $100 with tip depending on the type of service.
Also keep in mind that many of these nail places also have other services like waxing - which going to a wedding your wife may have wanted to wax her eyebrows, underarms, legs - not sure.
That is why it is best if you are concerned to ask her. But yeah you can pay over $100 - if you get the basics for everyday I'd say with tip I'd spend $50 - $60 and if I wanted to up it and do the spa style treatment it would be close to $100 (and this is without gel)