编辑同志:我们居委会的张大娘已经七十多岁了,老伴两年前去世,她孤独一人,没有任何经济来源,惟一的女儿早年出嫁,现在对她不管不问。老太太身边很需要有个人照顾,她与同院的青年小李商量并签下协议:由小李对她承担生养死葬的各种义务,在她去世后,她的两间私房归小李所有。请问,他们之间签订的这份协议具有法律效力吗? Editor’s Comrade: Our aunt Zhang aunt has more than seventy years old, his wife died two years ago, she was alone, there is no financial source, the only daughter was married early in the year, and now regardless of her. The old lady needs personal care very much. She negotiates and signs the agreement with the same youngster Li Xiaobin. She undertakes all the obligations of giving birth and death to her by Li Li. After her death, her two private houses belong to Li . Excuse me, is the agreement signed between them legal?