Some friends of her and work colleagues as well as my mother know about it or do it themselves so I was under the impression that's fine

It does work for some, however, for lots of younger women, it often doesn't since their bodies are still changing a lot and prone to stress.

Regarding emma she is on contraception, on multiple occasions when we met her 'pill alarm' went off (like the alarm set for the time to take the pill daily) hence i didnt wonder too much.

No birth control is 100%. By going raw, you're risking having a kid each single time.

She (emma) said she doesn't know what to do with the baby, she is pregnant for 1 month and about a week now and she wants to speak to her family first ...

She really also should consult her gyno about ALL the options she has.