So currently my friend is being harassed by an ex whom back in 2016 their families came together and had a chat with each other's family and decided that my friend and his ex are going to live together considered married although no marriage certificate.
Before the two was "married", back in 2014, my friend and his new girlfriend met but only reamained as friends. My friend had an on and off relationship with his ex due to the ex being jealous of the friend but when they were "married", there was no communication between my friend and his current gf now.
After that, my friend had been together with his ex at the residence of his ex's parental home with her child that is not my friend's but another man's child when his ex was younger and had been living together as though they were married but only for 6 weeks since she left the country 2 weeks later after the family came together to work as a domestic helper in in oman. After she left, since in traditional way, they are married she had been sending money on several occasions for her "family" which she sent to my friend's mother a total of 71,000 pesos.
After the girl left the country, my friend stayed at her parental home for another 2 weeks so he stayed with her family a total of 2 months.
A year later, in June 2017 she came home to the Philippines but went to visit her new boyfriend first. My friend learnt from the girls aunt that she had returned to the country so he went to see her but she was shocked to see him saying "what are you doing here? We're already broken up and how did you know I was home?" She also added "find someone else, or wait for me if you want". July 19 2017, she posted a new profile together with the new bf.
There was no communication between the two until my friend had a new GF officially together since Jan 1 2018 but had been seeing each other since December 9 2017. The ex then started bombarding the new lovers with text messages saying she wants her 71000 in full and will she the ex if not paid immediately. She has also been spreading rumors that the new girl is pregnant and had been talking badly about the girlfriend of her ex saying that "I knew they were secretly seeing each other when I was with him" although it was not true.
She had been treathening the current girlfriend back in 2014 when they were only friends as well as now through text messages and on Facebook.
So my question is, how badly can the ex girlfriend sue her ex boyfriend because the ex Is threathenig to sue my friend for concubinage although she would have committed adultery herself if the "marriage" was taken into account.
All the ex was interested in was getting her 71000 back in full but the money was spent on her child and some on my friend.
Can the new girlfriend sue the ex girlfriend for slander since she had been talking shit about her and it is ruining her reputation as the new girlfriend is studying to be a nurse and currently residing in another country.
My friend is ok to settle for half the 71000 but that's as a last resort.