Between A Cubs Game and a Hard Place

I am totally ok with being "that mom". You know, the one who talks on her cell phone at the park (I only do it sometimes), and the one with the extensive collection of Happy Meal toys that is almost embarrassing (I have to buy 2 at a time now, that is just why is seems there are so many, really, we aren't there that often). I am also the mom with the kid who is dressed like Cindy Lauper on acid circa 1987 (really, who wants to fight with a 4 year old about clothes?), and the other kid who is leaping out of the stroller because she refuses to allow the buckles to be done.
I am also ok with being "that girl". You know the one is who is often over served at weddings. Or the one who makes friends with the one person in the room that makes everyone uncomfortable (a la Chach and Alpana's engagement party and the bookslut, but I digress). We have all be "that girl" at one point or another, and I am totally ok with being her more often than not.
What I am not ok with is being "that wife". I never want to be the wife who tells her husband that he can't play hockey because his hands are what do the work to feed the family and if he gets hurt the gravy train passes us by (a la Mrs. Materialism, who we have to talk about later). I don't want to be that wife who makes it impossible to have a social life that does not include her. I enjoy when Tim goes out with his little friends. I like that he is exposed to people other than the fools he works with, and that he is forced to confront his social retardation. I trust Tim to make the best decisions keeping in mind what is best for his family. Which leads me to this....
Last night Tim's friend the 42 Year Old Bachelor calls and asks him if he wants to go to the Cubs Game on Saturday. Now I don't mind this guy, he is from Tim's hockey team and I think he understands Tim in a way that most people don't. they have fun together and he used to have this girlfriend who I kind of liked (I more tried to for the sake of the men folk) but he just dumped her because she didn't want to live with him and his mom in the event that they ever got married. This was too much for the bachelor- he could never kick his mom out of the house and really is it that hard to be married and live with someone who will help take care of the baby? Yes, yes it is, pal. Good luck finding someone who will go along with that.
Anyway, Tim and I had talked about this weekend and we planned on taking the girls to the Botanic Gardens. Tim has never been and I thought this would be a good way to celebrate Earth Day Weekend (and there is an antique fair going on). So Tim tells his pal he had to talk to me and that he would call him back, and then he did what he always does that makes me want to kill him....He gets off the phone and says to me, "Dude called to invite me to a Cubs game Saturday. HE has seats right behind the dugout. It sounds like a lot of fun, but I am going to tell him no because we are supposed to go to the Botanic Gardens and that will probably be closed Sunday, right?"
What the fuck.
So we did our song and dance where I ask him if he wants to go to the Cubs game (He does), and then I tell him that the Botanic Gardens are open Sunday. I make no reference to him definitely going to the game, and I just let him run with it. He puts me in this position where I feel like I am begging him to go do what he really wants to do so that I don't have to watch him play the martyr and hang out with his wife and kids.
Now, really I could care less about him going to the Cubs game or not. Sure, it will be a long day since he will work in the morning then go directly downtown. He will probably come home either drunk, or coming off of being drunk which makes him completely obnoxious, but I can deal. I just don't want to be his reason for not going. If he wanted to spend the day with the kids and that was his reason for not going that would be ok, but that wouldn't be his reason. It is usually something about how I need him to do something or that I didn't want him to go. In this scenario the reason he has been test driving is that I had planned a family day and I don't want to move it to Sunday (which is kind of true, but really it is more about the weather. If it is nice Sat then I don't want to roll the dice and expect good weather Sun because it never works out that way).

What is a girl to do?