Somebody asked me for a summary about what is the situation with Tanja in a PM, so I thought I should just post it here in case anybody else wants to know.
Tanja, let's see. Tanja is married and in love with Rebecca's middle brother Sebastian and they have a baby. Clarissa is her arch nemesis from back when Tanja used to be real baddie.
Among other things Tanja tried to kill Clarissa and then framed her for a crime she didn't committ and Clarissa was innocently in jail for 10 years. While Clarissa was gone Tanja also took her fashion company with the explicit goal to slander the name of her old enemy (I believe Tanja's hate for Clarissa goes back to the day when Clarissa would not accept her when Tanja tried to trick and marry her way into the von Anstetten family though Clarissa herself also came from a poor background, though note that Clarissa wasn't exactly a nice person either before Tanja framed her). Now Clarissa is out and she's back for revenge. She wants to destroy Tanja's life at all costs.
Sebastian and Tanja had a big fight because Sebastian voted against her at the company board and as revenge slept with Ansgar. Sebastian then almost slept with his old friend Sonja (the curly haired girl) in revenge. Tanja is terribly afraid of losing Sebastian to Sonja, so she had Sonja framed for selling her designs to the competition. She didn't know that the guy from the competition was actually a trap by Clarissa and Clarissa outed Tanja's scheme against Sonja with Sebastian. Sebastian was so angry he told Tanja he wants a divorce and he moved out of their suite, that's why Tanja was crying
There was a very beautiful scene where Marlene goes to her and holds her hand and tells her that it was over the top to do that to Sonja and that Tanja should have trusted Sebastian, but Tanja got angry and she now wants to fight dirty in the divorce. In the most recent episode Tanja gets angry when she sees Sebastian with Sonja. She strikes a deal with Ansgar to frame Sebastian for something so Tanja will get custody of their child. But based on the spoilers then last minute Tanja stops the scheme when she sees a video of Sebastian and Sonja almost sleeping together. She goes to LCL to confront Sonja and they get into an argument. Sonja walks away from her and tumbles down the stairs.
She's hurt badly and everybody thinks Tanja pushed her down the stairs and Tanja will go to jail for it. There are security tapes that prove that Tanja is innocent but Clarissa hides them because she wants Tanja to go to jail for a crime she didn't commit just like it happened to Clarissa.
I wonder if any of this will show up in Marbecca at all since of course Marlene is a friend to Tanja and Sonja is a friend to Rebecca. It is only mentioned that Marbecca put their fight to rest when they hear of the tragedy that befell Sonja, but it's not known what position they take in regard to Tanja going to jail for it.
The next thing that happens in the picture spoilers is that Clarissa's grandson Timo is really sick. He needs a new liver.
Sebastian is the only one can be the donor, but he tries to blackmail Clarissa. Clarissa gives him the tapes that prove Tanja's innocence or else he won't give his liver. Clarissa apparently then has Sebastian abducted and wants to take his liver illegally! But Ansgar saves Sebastian! At the hospital it seems that Sebastian meets the grandson and is very touched by his plight and ends up donating parts of his liver anyway. Clarissa gives the tapes to Tanja. Sebastian and the grandson are in surgery and everybody is worried whether they'll come out alright!