Question: One of my friends went out with her boyfriend . They both are going to get married so her boyfriend due to the moment of heat fingered her astagfiruallh she has regret about it . I wanted to know weather it is Haram or Zina . Please answer my question and please tell me how can she overcome through it

Answer: 
She's regretting that is the sign of iman

Don't worry if she asked for forgiveness of Allah and make a decision not committing it again then she will as pure as she a new born

May Allah forgive us
They're going to marry but either way it's a sin, she is regretting it so if she asked for forgiveness it's fine now.
If you have iman in Allah and not repeat the sin again she may be forgiven, may Allah forgive her and us all.
Hope i helped you(: