If for any reason Mansen and Khushal now go after Shish for doing this as they had warned him not to trouble Bhoomi then he can be the one to tell everyone the truth, and i think LK once mentioned that let Shish be the nimet.
There are lots of options at this time, I am sure Bhoomi will not disclose the truth about Mansen and Mamaji, but shish can, keshav can if he sees his sister in trouble, Mansen himself can but i dont think he will and i dont think Khushal will let him even if he wants to.
Once Manasvi knows the truth she may not want to marry Suraj as he is Mansen's son.
So lets just wait and watch .... interesting huh ...