T.T.
The meals sound like a nice idea. I am a pastor's wife and always seem to be running here and there. I have had some dear friends bring dinner on different occasions and it meant SO much to me!
Consider some casseroles like lasagna, or enchiladas, that you can freeze... then give it to her and tell her she can use it when she has a stressful day with no time to cook. Also good frozen... muffins, cookies, cake, etc.
The babysitting idea is nice too- tell her to plan a night out for her and her hubby and let you know so you can watch the kids. Then remind her about once a month until she takes you up on it!
She's blessed to have a friend like you.