CYP
Your wife is just approaching baptism this weekend, right? She's probably in what is very close to an ecstatic state of mind - it's very similar on an emotional level to the anticipation of your wedding day. There's likely nothing that can get her to change her mind at this point.
However, once she comes up out of that water, and is a bona fide member of JWs, it will be just a short time until she is no longer being preened and fawned over (aka "love bombed") by her congregation. She won't get help when she asks for it. She'll get frustrated by people who were once so nice to her but suddenly treat her with indifference. They've moved on to their next victims recruits.
When that happens, be very sympathetic. Do nice things to cheer her up. If someone says something mean to her at the KH, take her out for brunch the next Sunday. In fact, brunch on Sundays is a wonderful family activity (especially if you follow it with something fun for the kids) that you can use as a way to stay connected as a family. You can drop her off at the meeting and pick her up afterward while you take the kids to a museum or other activity. When you make these plans, talk about it as though you're doing her a favor by letting her have a chance to concentrate on the meeting without being distracted by the children. She'll think it's pretty benign at first and probably won't object to the kids going with you. Have so much fun with the kids during that time that they'd rather spend 2 hours at the dentist than at the KH.
The next step is to have fun with your wife - if the meetings are Tuesday and Thursday, get tickets to a show on one of those nights and take her out. It doesn't have to be every week, but you want to inject enough "fun" into your family life that missing a meeting here and there won't seem like a big deal to her.
Whatever you do, keep a copy of the Dec 15, 2001 Watchtower handy. The Questions From Readers at the back of the magazine makes it very clear that as the "unbelieving husband" you have the right to observe holidays and celebrations in your home, with the expectation that she will support it provided that she does not engage in "acts of false worship". It means that you can observe your children's birthdays, her birthday, your birthday, Mother's Day, Father's Day, Easter, Christmas, Thanksgiving, the 4th of July, etc. and as long as you keep asking her - when she objects to something - "how is it an act of false worship to do _____??", you'll get her thinking critically about what she believes (or doesn't believe).