a couple who suffered five devastating miscarriages and lost their six-month-old son because he was born prematurely finally have the family they dreamed of after his sister acted as a surrogate .
pritesh , from feltham , london , did manage to eventually become pregnant and gave birth in 2007 but khushi was so premature he died after a six-month fight for life .
however , pritesh 's sister hiral shah , 32 , stepped in and offered to carry the couple 's baby - and after ivf treatment , gave birth to krish three weeks ago after a 20-minute labour .