I think you really do know Tinkjon that you have to do it, no matter how boring!
Wills are vital even if you are married. We have had massive problems with this after my mum and her husband died within weeks of one another, with not a will between them.
Many solicitors offer cheap wills every year for WillAid, with some of the money going to charity. I think it's usually October-November they do this.
Life insurance is also vital for both of you. I'm somewhat aghast you haven't got insurance to cover your full mortgage, I must admit.
I know you say you don't contribute financially, but say you died when your children were still youngish. At least insurance would mean your husband would be either to afford childcare if that were needed, or to have a sabbatical from work for a while, or even reduce his working hours. All this would really take the pressure off. And being mortgage-free would also ease some of the strain at such a time.
I have stayed at home with the children for years, but we have actually paid for more life insurance for me than my husband, simply because he is insured for 4-5 times his salary through his employer.
Apart from this work life insurance, we have a joint policy and I also have a single policy just for me, to top my insurance up to what my husband's is. We also have a policy which would pay off the mortgage - this is a declining policy where the amount insured falls every year because our mortgage is decreasing every year. The other policies end when our youngest child is 21.
All our policies include critical-life insurance, so they would pay out not just on death but for many illnesses and conditions.
It really doesn't take long to set up these things and needn't cost all that much either.