She might get bold all of a sudden but I can see the hesitation and shyness in her. It is quite evident. When a person gets ready, like how you have said Emon became ready, it is also because of the love for the partner.
The hesitation is left behind or in other words a person fights back the hesitation when they love someone to get ready.
I am telling based on what I have observed about Sai, she is bold but yet to get bold in these.
If we go by KD, Emon was always a shy one, Rono used to be very romantic and always used to make moves. There was just one instance where, after the Shruthi track, she will cling on to him and wouldn't let him even open the door for the couple. Even then, Emon would have wanted that hug, it was an emotional one, more like an assurance that he was with her. She wouldn't want to let him go.
Mujhe pata hain ek ladki shy ho gi hi but sorry to say sai is not that bacchi nor emon was only deal things is stopping her nothing else. Sai will never object to virat's deeds shy hona alag baat hain.
Sai ke ander bahut kuch hain to vo dekhati nhi hain. I m not saying about physical intimacy.
Sai ko sab samajh aata hain ki virat kya keh raha kya kar hain she is observe virat a lot .
Current generation many people r sexually active in 17 time has changed .
Anyway virat will not proceed till sai give green flag .
We can agree to disagree.