Ok...so need some advice plz...I was watching my sisters two boys...age 10..and 7...i have a lively 3 yr old and while they were eating at the table my 3 yr old knocked the 7yr olds glasses onto the tiled floor breaking the frame under one of the lens...the cost to repair them is £75 and my partner is steadfast against paying for them while i think we should...my sister i think is expecting us to pay for them...what would you do??...my partner believes that because i was doing her a favour looking after her boys that should warrant not paying...also that our boy is only 3 and didnt know better...he thinks my sister is out of order expecting us to pay!! What do you all think? Thanks