Dude, I have a conservative wife as well and I am an Indian too.. I think we should connect and explore what options we have! My wife enjoys the 8" dildo I got her and everytime she takes it in her pussy, she makes faces like I have never seen with me.. Like you she says the same that she does it to make me happy but she does enjoy it! Also, I have seen her checking young guys at my ......'s swim school, I just wish someone hits on her!
We can explore more ideas!