here in GCC there are courts and I believe also in the country where the woman is from and the courts will give each one his/her rights.
The second part I will asnswer from a believer point of view:
If the court can not do any thing then I will the man if he is a Muslim you win today but believe there is a day of judgement and every thing you do in this life is recorded, I will tell the woman the same and your rights will not disappear and your rights will come sooner or later, if not in this life then in the day of judgement.
Now back to the topic, how important it is to study the consequences of such relationships?
1. Vey important
2. Normal
3. Not important at all