I wasn't going to admit it, but I did the same thing, but it was my boyfriend (now my OH) playing rugby. I loathe and detest the game, it's usually freezing cold, wet and soggy underfoot and the spectators are more dangerous than the players. Where I came from the women spectators often ended up having fights. I have never been able to come to grips with the game, for the least little reason it seems they stop and have mauls or scrums or something equally uncomfortable looking. So I'd sit in my car and read my book, look up occasionally hoping I'd see boyfriend doing something spectacular, usually miss the vital moment, then have to pretend I'd seen and understood it all.
A teacher at school once advised that if you knew nothing about rugby, to just drop little intelligent comments in once in a while. Things like 'There's no 'beg your pardons' about that ruck!' Well I tried it once in a packed pub, during a fairly important part of the game. Unfortunately, it wasn't a ruck, it was something else and boy did I get some filthy looks. Should have stuck to reading my book again.