There is definitely a HE in this equation, it takes two to tango, the only problem is that this HE is the wrong one. She lied and deceived him and now she's she's acting like the victim. No person should be treated like he is, whether they be male, female, with or without children she must take responsibility for her actions. Why hasn't she tried to contact the real father? Is it because she doesn't know who he is?
The real father deserves to know he has a daughter
The daughter deserves to know who her real father is, one reason being possible hereditary diseases
The real father needs to step up to the plate and be a man instead of letting another man pay for his child
All the pain that poor girl is experiencing is because her mother caused it 13 years ago. If the roles were reversed and I were a man, I would definitely be crushed to know that not only has my wife cheated on me but I'm also paying for her lies.