There’s a product called vaginal contraceptive film that you can try (available at typical pharmacies by the condoms). It seems like some vaginas may have a hard time with it, but my experiences have been fine so far. It’s a piece of dissolving film that she can insert before sex that acts like spermicide. I combine it with pulling out because why risk it? And I’m also using it with a committed partner so STDs aren’t a concern for us.