Tom,
I think the yardage on 15 for women is 120, so your calculus of the carry seems right. However, the ladies tee to the left is more elevated than the men's tee, and there was a breeze partially against that day. (The hole is even more stunning from that tee).
I was trying to read her mind as she teed it up on 15. I imagined it as exactly how we feel as we place peg in ground on 16: you know you need a solid strike to get there. She might have just made it over with a good strike, but didn't catch it entirely solid.
On sixteen, she struck a low burner under the breeze and just cleared the chasm, but it was close enough to make it exciting.
Your Dad would have no problem handling 15 and 16 at Cypress. He can reach 15, and has enough carry for the layup yardage on 16. Upon arrival at 16, my Dad immediately asked the caddie for the layup yardage to the left. He told me later the layup there was still a thrilling shot for him.
It was way cool to tour Cypress with my Mom and Dad!
Ken