Friends of mine, also mature, wrote vows, using some of the traditional language, and said "forsaking no others"
I like it.
We are (sloooowly) working on redoing our vows too. I asked her to remarry me at a very emotional HAI level 1. But since then, we've been kind of stuck as to how to proceed with that. I don't think her minister will be happy with our new vows, but she's kinda attached to him.