My NFP instructors told us that in addition to the regular NFP series of classes, there is also one for premenopausal couples and for postpartum return of fertility. Those periods of a woman’s life are notoriously unpredictable, but the Sympto-Thermal method of observing the fertility are
supposed to tell you when your wife is not fertile. So you could look into taking that class at your parish.
About the contact between the two of you during her fertile times when you must abstain, so you can avoid a potential dangerous pregnancy…I think cuddling, kissing, caressing is all not only acceptable, but encouraged. But seeking sexual gratification outside of the marital act is not licit, whether for the husband or the wife. Now, of course, if you are intending to have intercourse but get interrupted, so that the act cannot be completed, that is not sinful, that is just life!

This is what I was informed, when I started to inquire about these things. My priest gave me a book by Christopher West and I also learned a lot from my NFP instructors and my new Catholic friends who were willing to be open about these matters.
By the way, I think it is sweet that you are willing to find ways to better love your wife even while she is going through the change of life. This is a challenging time, but focusing upon how to enjoy each other in a way that is pleasing to God is a surefire way to keep the romance alive.
