One month anniversary dilemma!?

Since she said all she wants is flowers I think you should just get her flowers and make her a card. One month isn't that long so you should save the nice gifts for anniversaries like 6 months. You can tell her you think your anniversary would be more special if just the two of you went on a date together and you can compromise by suggesting that you go out on the double date a different night. Tell her you want to take her to a nice restaurant and just want to spend quality time talking with her on your anniversary and I think she should be happy with your suggestion.