As a 29 year old myself, I'm not a child and am fully capable of deciding what I want to do with my life and who I want to sleep with. Al Pacino's girlfriend is not a helpless child. She is able to weigh the pros and cons of sleeping with an old millionaire actor and bearing his child. Pros: millions of dollars in the will, or at worst in child support. Cons: he's old. While I personally would not make the choice myself I think it's valid if she decides the money and status is worth it for her. 29 is a grown ass adult. We are infantalising a grown woman and denying her agency when we imply she is a victim knowing nothing about the relationship except the age gap.
For example: she might like older (celebrity, rich) men. She chose to date Mick Jagger before Al Pacino after all.
She's also the VP of a film production company. You can't do that without being smart and capable of decision making.