1) If your 阿嬸 want to get as much as she can ($ + flat) from that man, then she should talk to a lawyer, not 社工.
2) If your 阿嬸 want to 申請綜緩 so that she don't need to work and have $ monthly..... then talk to 社工 or wait for some years until she get *** in her id.
3) If she want to 靠 herself, then 拿拿聲去揾工做la. As all her kids are full day in school, she can work! (like most of the hk poeple, father and mother are all have their work when their kids go to 小學). The elder kid (中學) can take care of the younger kid (小學) after school.
4) Back to the place she lived before............