Ok.. let me make a summary of the whole story. You got it right actually, but you need to know how things happened.
Ana was a top tennis player, who had a 1 day stand with this guy Rodrigo, and got pregnant. He wanted to have a relationship with her, but when her mother saw them together, she cut the relationship short saying it couldn't be good for her career and Ana just broke up with him. Like.. after literally 1 day. But... Ana got pregnant after that 1 time. Ana's mother went bananas over the pregnancy, saying it would ruin her career completely. Ana's mother clearly never heard of Kim Clijsters.
She wanted Ana to abort, but Ana decided not to.. so she ended up convincing Ana to give the baby away for adoption, and go to some remote place saying she had this bad tennis elbow injury, so her sponsor wouldn't break the contract because of the pregnancy.
Ana agreed. All this time, Ana's sister Manu was trying to convince Ana of just being honest, telling Rodrigo she was pregnant and having the baby. But Ana did all her mom would tell her to do. The same mom couldn't care less about Manu, and often threated her as she didn't exist. Manu and Ana were best friends though.. and certainly there was nobody in the world that Manu worshipped more. Ana did all her mom told her to do, but when she had the baby she decided she couldn't give her up for adoption. Her mom went crazy and registered the baby as her own daughter. They went back, and Manu finally convinced Ana to do the right thing and go look for Rodrigo to tell him he had a daughter. They talked and Ana told Rodrigo to meet her the next day on her grandma's house, in another city. So Ana decided to leave to her grandma's house overnight to avoid any confrontation with her mother. Manu only wanted to go in the morning, but accepted. Ana, Manu and baby Julia took the car at night and had this terrible accident. Ana got into a coma, while Manu and Julia had injuries but recovered. Doctors told all of them that Ana could be in that state forever. Ana's mom Eva then blamed Manu for the accident, kicked her and the baby out of the house. Manu went to live with her grandma and then decided she had to tell Rodrigo the truth and told him he was Julia's father. He decided to take care of the baby, but then his own father kicked him out of the house. He had no way with the baby and kept calling Manu for help... he also had no job and no house.. then Manu's grandma had the idea of inviting him to stay with them, so Manu and Rodrigo could take turns taking care of the baby, and would be able to work and still finish college. They started to raise the girl together, opened up a business together, so they could work and still be around the baby. After about 3 years like this, they started to fall in love.. and then they got married. Baby Julia started calling Manu mom, as she was the only mother figure she had. Another 3 years went by, and around Julia's 6th birthday Ana woke up. Scroll to minute 3:00 of this scene: http://tvg.globo.com/novelas/a-vida-...?mais_vistos=1
Manu wrote Ana a blog with everything that was happening those years so she could see Julia growing up if she ever woke up. When that happened, Manu felt terribly guilty for having married her sister's former love, and Rodrigo felt like a part of his past that never had a real ending was coming back. Julia couldn't really call Ana mom, even though Manu would take her to see Ana every week during all that time and explained who her mom really was. So the 3 of them were incredibly awkward around each other until Manu confronted both of them separately, saying she wanted to know the truth, wanted to know if they still had feelings for each other. Both denied. And then that scene happened.. Manu decided to go work in another city, and stay with Julia during weekends only. She was really hurt by them lying to her and got really bitter at one point, but ended up being sort of apart from the little girl, which is what Ana acused her of. Rodrigo and Ana tried to have a relationship, but they were never really happy... and Julia didn't take it well. So Ana dumped Rodrigo saying she couldn't be with him considering Julia's resistence. She went on to get engaged to Lucio, a doctor who helped in her recovery. And then that argument scene took place. Manu acused Ana of running away, of destroying her relationship with Rodrigo for nothing and of toying with poor Lucio, while Ana acused Manu of stealing the life she was supposed to have (marrying Rodrigo, raising Julia, building the house together). After the discussion with Manu Ana went bananas, blaming herself for never knowing what she really wanted and never really going after what she truly believed in. Julia got sick, and that united the 3 of them again. Manu donated her a part of her liver, and Julia survived. Manu and Ana made up. Ana and Rodrigo broke up for good. Ana married Lucio, and Rodrigo went back to Manu. The end.