I suggest Long Beach Island to which it is commonly referred, is an 18-mile-long barrier island that's accessible by a causeway, located off the coast about mid-way down Jersey Shore, a short drive north of Atlantic City. . The southern end of the island is more lively and populated and is often the choice for families with children.There are also beaches on the bay side of the island, which offer calmer, shallower water for swimming. You and your family member won't find any glitzy amusements, with the exception of the Fantasy Island Amusement Park -- a tiny park in Beach Haven, which has small rides and a handful of games for the kids.. I think, It is near from your location
It is the best place for your spending your vacation time @knircky
You can see some review and tourism guide from : https://www.tripadvisor.com/ShowUserReviews-g46292-d11444615-r516319442-Long_Beach_Island_Historical_Museum-Beach_Haven_Long_Beach_Island_New_Jersey.html
I like Long Beach Island (besides for the life guard creeps that prevent free swimming from 9-5 PM). However, I am guessing @knircky would like a more exotic destination.
Given the tight timeline, I am thinking you & wife will want a direct flight. This webpage came up. I think any of the options in the Caribbean would be a good choice. Also perhaps Bermuda.