Originally Posted by
Wildwood
yeah, OP never stated sis-in-law's prior cycling experience. i assumed little to none.
Unlike probably most skills, there's a world of difference between little and none when it comes to riding bikes. Barring some catastrophic health event, once you learn how to balance and steer a bike, that knowledge stays with you throughout your life with or without practice. It's the prime example of a "non-perishable skill."
Sorry to push back on you so hard, but from what I've seen, the reason a lot of people trying to increase their physical activity choose cycling is because being outside moving around is actually its own incentive.
Getting back to the OP, my first suggestion would be to ask her why she wants drop bars. She might actually have a good reason. Flat bar hand positions aren't good for everybody.