【案例】老赵和妻子育有两个儿子,即赵大林、赵二林,两个儿子已先后结婚成家另过。由于父母年纪较大,需要儿子的照顾,2010年2月在至亲的见证下,两个儿子与父母签订了分包赡养协议:赵大林负责赡养父亲、赵二林负责赡养母亲,互不干涉。2014年3月,老赵因心脏病去世,丧事由赵大林操办。2015年11月,其母亲患重病住院治疗,赵二林经济条件不是很好,无力独自承担昂贵的医疗 [Case] ​​Lao Zhao and his wife have two sons, namely Zhao Dalin and Zhao Erlin, and their two sons have already married and married. As their parents are older and need the care of their sons, in February 2010, under the witness of their loved one, the two sons signed a sub-maintenance agreement with their parents: Zhao Dalin is responsible for supporting his father and Zhao Erlin is responsible for supporting his mother without interfering with each other. March 2014, Zhao died of a heart attack, funeral by Zhao Dalin. In November 2015, his mother was hospitalized for serious illness and Zhao Erlin was not in a good financial position to afford expensive medical treatment alone