Nobody's Baby But Mine (Chicago Stars 3) by Susan Elizabeth Phillips

Genius physics professor Dr. Jane Darlington desperately wants a baby. But finding a father won’t be easy.

Jane’s super-intelligence made her feel like a freak when she was growing up, and she’s determined to spare her own child that suffering. Which means she must find someone very special to father her child. Someone who’s more comfortable working out his muscles than exercising his brain.

Cal Bonner, the Chicago Stars’ legendary quarterback, seems like the perfect choice. But his champion good looks and down-home ways are deceiving. Dr. Jane is about to learn a little too late that this good ol’ boy is a lot smarter than he lets on—and he’s not about to be used and abandoned by a brainy, baby-mad schemer.