This will be Georgia in the Caucasus - formerly part of the USSR.
No, it's very unlikely that she was coerced though she is almost certain to claim she was. She will have been "groomed" online and promised a free holiday to SE Asia. Being young and stupid, she won't have stopped to wonder what the catch was until her handler met her in Bangkok to hand over the drugs. Maybe at that stage a case could be made for coercion in the sense that she would have found it almost impossible to refuse, but I go back to the point about why she might have thought that this really was a no-strings-attached free holiday. It's not as though similar cases aren't in the UK news quite regularly.
She will also have been very aware of the case of Lindsay Sandiford, a middle aged woman from Redcar (about 10 miles from Billingham) who has been on death row in Indonesia for around 10 years for drug smuggling.
en.wikipedia.org