shiv got a dosh in his kundali tht his wife wud die within 8months of marriage. so nikhila makes this plan of marryin shiv and gauri, for tht on gauri's weddin day she makes the groom run away and mahen forces shiv to marry gauri(even though he knew everythin, and he didn't believe in kundali and all he didn;t want to risk ipshitha;s life)so he marries gauri, but tries to get a divorce from the beginin but gauri refuse to divorce shiv and later shiv realize tht gauri "ek achi insaan hai", and they become friends and gauri falls in love with shiv, but after tht shiv tells gauri abt the kundali problem and gauri leaves shiv, later realizes tht she can't live without shiv and comes back to shiv, and later they reveal tht shiv and ippy r lovers and he married gauri only to marry ippy after gauri dies. but now he reallty cares for gauri and wants her to leave him , so tht she won;t die. and guruji predicts tht gauri will die on jan 31st.in between ippy gets engaged to anupam and on their engagement gauri and shiv consumate the marriage. and later gauri meets with an accident. but she survives and later it is revealed tht gauri got a very strong kundali and with tht all the dosh in shiv's kundali was cleared. and now ippy asks shiv to tell gauri abt them and divorce her. when he was abt to tell gauri the truth, gauri tells him tht she is pregnant.
i think u saw the rest, and hope i this helped. if u have any doubts u can ask me 😊