I am not an attorney, and anything I write on this forum is strictly my own opinion, or an account of my own personal experiences. I recommend consulting your attorney in all matters related to the law.
Ok, I assume that every state has its own laws governing real estate but, I believe that in some states a listing agent is not required to present certain offers if the seller signs an agreement to that effect. However, I think most standard listing agreements usually require the listing agent to present all formal/written offers to the seller.
Have your agent check with her broker first (brokers are supposed to know the real estate laws), but she could maybe present the written offer directly to the seller if the listing agent refuses to. Truth is, if you get a paper copy of the offer, you might be able to take the offer directly to the seller yourself (depends on the laws in your area). However, if your agent's broker talks to the listing agent's broker, it's quite possible that the issue could be resolved that way, and nobody would need to circumvent the listing agent.
Depending on the listing agreement, it's likely that even if you or your agent circumvents the listing agent in presenting the offer, the seller will probably still wind up having to pay her listing agent's commission in the end. She would need to check her listing agreement to find out.