I'd reject it out of hand and not waste money on an attorney. It might be actuarially equivalent; we don't know the ages of either party. but unless he can show why it is in her interest to do so, you are under no obligation to consider it. Also consider that your mom would have to have some way to enforce the maintenance of the policy - who would own it, what happens if he doesn't pay premiums, etc. and the hassle and complication of that alone probably makes it not worthwhile.