My sister is 18 years old and it came as a huge shock to us that she was pregnant. by the time we found out it was to late to get an abortion. Now though her son is 11 months old and we coudnt live without him. They do both live at home with me ( her younger sister) and our parents. Things are difficult but we manage just fine. However ive noticed that since the babys been born shes always tired and never wants to do anything she used to love. I know that is very normal (being a mother and all) but she doesnt seem to want to play with her son, she says shes going to tidy her room but instead sits on her phone for a few hours until we go find her. She works as a lifeguard (as well as being at college part time) but shes been asking for more and more shifts lately and when we say "what about your son, he hasnt seen his mum in over a week", she shrugs it off as if shes avoiding him. She also doesnt seem interested in her sons achievments for instance he took his first steps a few days ago and she wasnt interested at all. It might be nothing but I know she hasnt been happy lately. Is there anything to worry about?