My ex has our younger two girls, aged 9 and 11 every other weekend, unless that clashes with a work event, which through the summer is frequent. However, I have found out that he is leaving them alone in the house several times a day to attend to work matters. He can be gone any where from 10 mins to an hour. The girls never know long he is going to be out, they do have phones and he is rarely more than 2 miles away, but it upsets them. The Internet says its not illegal but I am not happy about it. I ensure my girls always have an adult in the house (me or my 18 year old daughter) as I think it's appropriate and safe. He did it several times last year and I told him it wasn't to happen and it stopped but now it turns out that it is a regular occurance, and he has told them not to tell me, and he has also stated to the girls that if I have a problem with it then he won't be able to see them any more at all and it will be my fault. I have suggested that he see them them in an evening on weekdays instead and return them home so they won't be left but he has said he cant do that either as he has ither commitments. It has also got to the point that I have had to threaten to suspend contact as he is smoking with them in the car. This is illegal and my 12 year old has asthma. I also have very real concerns of the cleanliness of his home, they complain it smells of animal urine and dirt. I have mentioned it several times but he says they are over reacting. Tbh he has lower than average stands of cleanliness and personal hygiene and his dirty scruffy ways are a big part of why we are not together. All I am asking is for the 4 days a month he sees the girls that he ensures the house is clean, he doesn't smoke in the car and he doesn't leave them alone at all .He refuses to agree and states that I am being unreasonable, ...am I ?