Yes, but my DD was 2 and 10 months when DS was born.
Similarly I carried him in a sling for ages. Heck i still do it. But she was that little bit older IYKWIM? Sometimes at nearly 4 she still occasionally asks to go in the stroller.
BUT saying that I was so glad I didn't get the doulble as it would have been a total waste after only a couple of months.