If you do have kids while one or both are in the tower, they are going to hound. If the husband remains in, they will give him the power to yank those kids to the Kingdumb Hells during the boasting session and force them to be raised in the cult. That is "theocraptic headship", and it is truly spouse (and child) abuse. However, they do practice this sort of abuse, and will do everything to force the husband to be ultra-strict with them.
If you choose to bring them up around the tower and not be strict, Brother Hounder is going to become familiar with your place. He will hound them to give up all the nice things that are "conscience matters", including vacations, music, college, and after-school activities. If just him is in at the time, Brother Hounder will continue hounding him to disregard the wife's opinions about this and forcibly bring them up strict as witlesses. No discretion is allowed there, since the hounders will make sure he is doing so. If he fails, they will take away his "privileges" and even threaten him with reproof for failure to provide spiritually for the children.
The best you could do is to make sure you are on the same page before having children. Make it clear that, if they are going to become witlesses, it isn't until they have examined the religion from ALL sides. Any material that is critical needs to be examined, since it is necessary to properly integrate before making the decision. Left unchecked, they will hound any children to get baptized at age 6 or shortly after (it is getting worse: back in the 1980s, they were suggesting age 12 and showcasing 6 year olds that got baptized). There is no way any children should become unbaptized publishers before at least 16 years of age and having read Crisis of Conscience and at least two apostate Web sites that are not total collusions of each other, in addition to official material. They should not be allowed to get baptized until at least 18 years old and having read Crisis of Conscience and at least 3 other independent apostate web sites.
And, if they try to force, coerce, or trick the children into getting baptized before then, you have a clear warning that they are forcing them into a scam. Legitimate offers do not try to foreclose the deal before the people have the chance to read all sides. And, if they had the truth, the apostate web sites and Crisis of Conscience would look like they are nothing more than "Go To Hell" messages while the official site would appear rational. Otherwise, they are hot air. No, you should not let them be tricked into thinking they will be destroyed if Armageddon comes, they reach age 7, and are not yet baptized. That is yet another trick they use to coerce people. Any of those stunts should be grounds for the children to integrate them into their decisions, probably not to get baptized.
Plus, it should serve as a stimulus for one or both of you to begin a fade; or if family ties permit, possibly when the time is right, to outright leave the scam.