I think that’s definitely possible, in the context of the movie version of the story.* “[Lestat] knew me, he knew I would love her more than the waking world.” Very poetic *u*
Expecting a child doesn’t necessarily mean you love kids, BUT, Lestat could read minds, and perhaps he knew just how much being a father meant to Louis. Louis doesn’t speak much of his own father, when he died, Louis had to take over the family business at a relatively young age, so maybe Louis was really looking forward to being a better and more loving a father than the one he had grown up with ;A;
PLUS, it seems like it would have been Louis’s first child, making him a father for the first time. I can’t imagine what that must feel like, expecting to have your wife back in your arms, and a new baby to love and raise, and then get neither back, knowing your wife died in pain?? ;A;

Even if Louis wasn’t a kid person, I mean, how can you not love a super cute 5 yr old angel like Claudia was originally? Scooped out of abject poverty and sickness, someone you could lavish with gifts and who would be grateful for it, having known only the barest no-frills of a life before? Lestat knew Louis would feel protective of her, she could be something to inspire him to learn to live again. You can experience the world anew with them as they learn about it ❤
*In the book version, it’s a younger brother that Louis had lost recently, Paul, a brother Louis was very close to. The death sends Louis spiraling into guilt and depression bc he feels responsible for it (and others, including his own family, blame him for it directly).
When Paul died, Louis says: “my mother told everyone in the parish that something horrible had happened in my room which I would not reveal; and even the police questioned me, on the word of my own mother.”
That feeling of blame in the situation is part of what made that loss so devastating to him, the death was preventable, if only he had had more patience with his brother ;A;
But with the loss of a child and wife in childbirth, I can imagine the husband feeling responsible for that, too. After all, if not for him, well, she wouldn’t have been pregnant (we’re assuming it was definitely his baby!) 😛