I was so blissful after the births of both my girls. Such a sense of peace and relief on both a mental and physical level!
15 and 19! It hasn't always been blissful, as any relationship's journey can attest to! But still a blessing. And maybe one day you'll be a dad...?
Ah, make the most of your nieces + nephews! You get to be the fun/cool/understanding uncle -- someone maybe a little more objective to turn to (depending on age!)