SS, when you assess situations, you should detach yourself emotionally from them, to be accurate. You're implying that she's in a forced marriage and unhappy and desperate and looking for a way out. You could be right - it is possible but if you do not communicate with her and gain necessary additional information, you're only left with assumptions. The other side of the situation - it is also possible that there are other more straightforward explanations eg:-

"her 2 years baby and hubby" - she was most probably noticing that you were staring at her and probably felt sorry for you, that (presumably) you were on your own and in danger of getting thrown out of the complex if the guards noticed you to be alone and stalking some lady.

I've been stalked before a number of times and found it very disconcerting. The first time - rather upsetting, until a friend of mine informed me (via mobile text reply) that for many bachelors, they go to shopping complexes to chill out on their only day off and because it's family day, they get stopped or tossed out and since it was gonna rain so ... I calmed down after that, once I understood the situation.

/Still had my eye on where the security guards were and the police on my speed dial.

I later found out that for entry and to remain in thse complexes, it's the way the guys look and/or carry themselves. Some get away with it with the way they look or their passports - whether country pp or female friends as pp. ;)

"was continuously noticing me"
"Then I followed her, she looked back at me and smiled." - Because she felt sorry for you.

"...and ask her why she is looking so depress or unsatisfied" - very likely, a figment of your imagination. But like I said, no one can say you are wrong unless they were looking at the same situation and assessing it objectively.

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