我的第一理解是：认识母亲的人.都认为她是一个令人愉快的人
这句话应该是省略句：
people consider to live with her that Your mother is a very pleasant person
to live with是不定式做定语.her其实可以省略
参考下下面的句子
Talk to the people you want to live with,be honest and sometimes accommodating.
跟想要合租的人进行交流,诚恳一点,有时也要包容一点