i dont think ,that india will go for russian mig35's despite it being an impressive aircraft, i also dont think india would be going for the super hornet unless if usa gives a very irresistible offer,nor for gripen,india may go for the french rafale or the eurofighter typhoon,this should keep russia slightly happy since it would not be losing its market to usa,india would be happy since it already has experience operating western aircrafts manufactured by france and uk,usa will be disappointed,but there is nothing that they can do about it.
to satisfy russia india has recently signed a deal for the purchase of 40 sukhoi 30mki's ,to supplement the 180 already ordered,india may also purchase 36 additional mig29k's to supplement the 24 already ordered,that is 76 additional aircrafts from russia.
also russia has a lot to lose it it turns completely to pakistan,for example india and russia have a defence agreement for anti ballistic missile development worth 10 billion dollars ,acquissition of defence equipment for the army and navy worth 10 billion dollars and joint development of defence technology,there is also provision in this agreement for india to shop abroad if russia is not able to provide technology to india's requirements,also the indo-russian trade which is growing ,though slowly and the indian investements in russia which are quite substantial.
selling of helicopters and a few engines to pakistan is not likely to affect the indo-russian trade , offcourse india will express its displeasure,but if russia sells pakistan fighters or if india acquires fighter from usa(in particular) then it would be an equation changing issue.