AIBU to say NO to Brownies?

[GraduallyGoingInsane]

Hi, I've been lurking a while, but never posted before! Be gentle with me please, I'm a newbie!

My DD4 has just got a space at the local Brownie pack - she's 8 and going into Year 4 in September. She's desperate to go of course, but I really don't want to add anything else into her schedule. So far, we do:

Monday - 1.5 hours of competitive cheerleading
Tuesday - 1.5 hours of ballet
Wednesday - 1.5 hours of competitive cheerleading
Thursday -
Friday - 2 hours of gymnastics
Saturday - 2 hours of ballet
Sunday -

Add in that she is DD4, and my other 3 all do cheerleading/gymnastics/ballet as well, that's a lot of running around. Plus DD3 is due to start Secondary this year, so I'd really like to keep our one free night sacred for homework and just general relaxing.

I have said no to Brownies - it would be on Thursdays, which is currently our only night in. I suggested she dropped one of the other activities in order to do Brownies, but you'd have thought I was threatening cutting off a limb. She is currently sulking upstairs.

Am I the meanest mummy in the world, and is Brownies REALLY worth sacrificing our only night in?!

We made our son choose between 2 sports when he was 7 as the one meant a competitive game on a Saturday morning and be other a Sunday, plus mid week training, he sulked but chose one.

We have just made him choose again, as we have told him either Tuesday's or Thursdays are straight home from school and no after school clubs, he sulked again but chose which one to drop.

I wasn't overly keen on our daughter doing brownies, but in actual fact it is now one of the thngs we insist she does do.

I am not in the clubs phase yet - my eldest (4) hasn't done anything like that yet, though I am finding out about local ones for when she's settled in school.

Your DD is old enough to make the decision of dropping something else though, so YANBU. It's hard though... I want my DD to be able to try everything!