jemma peacock , 31 , suffers from a rare form of stomach cancer and is currently taking three drugs to try to prolong her life .
the third and most effective drug - regorafenib - costs the nhs around £ 1,000 a week to provide and has been removed from the health service 's approved list of treatments .
mrs peacock , who lives with her husband tony and daughters kacie , six , and willow , four , has wild-type gastrointestinal cancer .