Life is tricky

How would one go about requesting the noisy neighbour be quiet? With out a fight? Ideally? 
I used to quite like my neighbour before her other half scarpered and left her with two small children. One who is a polite friendly little thing and the other who is just a bit dim, and nosy. 
Now she has a new fella( the neighbour not the eldest daughter) and he is a nasty looking piece of work. I really don't understand people who think it is fine to get drunken front of their children in the day time. Or in the evening until half ten at night. Because my kids might be in bed trying to sleep but hers are in the garden screeching at each other.
I of course may be wring about him being horrid. But he looks fairly nasty. :( one again I am feeling a bit like a meany for feeling this way.
The second tricky thing is that some people I love dearly are having a rough ride currently. I really home they manage to get things stable. They work well together. But life does throw lemons and the job to do is to make lemonade.