My DH and I had talked about how an eternity ring is usually given at the birth of your first child, however I told him not to buy me one at that time as we had spent a lot of money on our wedding (DD1 was a honeymoon baby) and the money was better used for baby things than on jewellery. It's my 30th birthday at the end of the year and I'd really like an eternity ring. DH would be spending money on a present for me anyway and there's nothing else I really want, but it's not the sort of thing you usually ask for. I know as well that if I did ask and he'd already planned to get me one, or something similar, then he'd feel as though I'd spoilt the surprise.
Should I ask or not?