I just want to gather info about spouse visa.

How if you arrived in the UK with spouse visa of 2 years but after staying 10 months, you have both decided to split? I met a Pinay here but she found out that her hubby has another woman after 10 months of living together in the UK. Her hubby has good reason why he fell out of love with his wife and his wife is only after citizenship so she accepts even her hubby has other woman, but her condition is to help her at the end of her visa to get ILR. Her hubby wants to send her to Philippines, but wife doesnt want to go home, How if Hubby will ask police assistance? Is that will helps her hubby to kick and send her wife to Pinas. How if the wife will go to CAB and tell she is not the first one who did wrong? Can she sue her hubby of Adultery? Is that will her to stay longer in this country?