Why not offer to find homes for the kittens and get her two cats spayed and neutered? That would be the best option for all of the animals. Why hasn't she gotten them fixed if she knew this would happen?
People sometimes... I swear.
And no, I wouldn't feed the kittens to your snake. You never know what diseases they may harbor and bring into your house. If this woman, regardless of being hickified, had enough common sense to spay/neuter her animals these things wouldn't have ever happened. It doesn't cost more than $25-$30 to get a male cat neutered, and females can be done for around $40-$50 at a Spay/Neuter Clinic. The SPCA can do them for you or give you a coupon to get them done if the owner can't/will not do it themselves.
Also, do yourself a favor and look here for a rabbit breeder: http://www.prma.org/breeder_rabbits.htm You may be able to find one very close in your area and can pick up a meal for your snake once every 2 weeks for probably $5-$7. They usually price depending on how much the rabbit weighs. Sometimes they will meet you halfway or they can ship(cheaper than RodentPro alot of the time).
Hope that helps.
