IMMORALITY: Grounds for Termination

I have been working for this BPO Company for the past 3 years already and am currently facing dismissal due to an filed case by my wife which involves Immorality. We have been separated for a year now and both parents to a 2 year old child. I have been supporting my child financially and I do have papers to prove my claim. My question is, "Is it lawful for my employer to dismiss me and my current partner who is now 6 months pregnant?". Our company's CoC states any immoral act is deemed terminable, but has no clause stating any definition of the term Immoral. Your immediate response will truly be appreciated.

does your partner also work at your company?