Ohoh and Snowing: When people ask me, I don't find it offensive. I just treat it as another life topic and discuss with people. Like when my uncles and aunties ask during new year, I always tell them I hope to have healthy children, hopefully soon. Then they got nothing to say also already mah. They will understand not everybody one-shot-one-kill right...
The 25 yo, she is probably exploring what life means to herself, and thinking ahead to when she will have children of her own...
I remember at a wedding dinner few months back, this guy I just met at the dinner ask me, so when are you going to have children? At that time Goi and I preparing to start trying soon, so I just tell him we intend to start a family very soon. Turns out he got 3 month old baby, and he was giving me a lot of baby tips, in-laws tips. Quite OK la.
If the person who is asking is very irritating, just bo hew him/her la! Otherwise, treat as chit chat lorh...