www.bbc.co.uk/programmes/m001c3f7
I don't know if the link will work, but it's a BBC series called Am I being unreasonable? Plot seems to be ordinary woman, grumbles about her husband, cat is missing, sits on the sofa with wine most evenings until an intriguing new friend at the school gates appears to have a dark secret. Like a cross between Motherland and The Stranger. I mean if it includes difficult neighbours/ parking/ in-laws it would just take the biscuit, but still!