PREVIEW: Jack comforts an ailing Jennifer; everyone learns that Tony could be the twin's father. SUMMARY: **from SoapCity.com** With the threat of paralysis, Tony fears that his dream of having children may be destroyed forever. Meanwhile, Brady feels guilty that Tony may be paralyzed for rescuing him and he's stricken when Tony tells him the file he unearthed was actually a charitable gesture toward John and Basic Black. Brady tells John about this, but is unmoved and tells Tony he won't let Brady be indebted to him... Belle agrees to give Shawn the space he needs, but promises to wait for him, while Cassie is relieved to learn that Shawn won't confide in Belle. They learn of Brady and Tony's accident and all head to the hospital. Meanwhile, Marlena talks to Sami about her complex relationship with Tony. John, Marlena, Sami and Lexie are stunned to learn that Tony has a very rare blood type -- one he shares with Cassie. He needs a transfusion for surgery and Marlena persuades C