I usually pick up my best friend's dd up on a Tuesday and Wednesday from shool and have her for a couple of hours until her mum gets back from work. I love them both dearly and don't usually mind doing this as it saves her money on afterschool club. However this week I know her dp is off work to paint the hall. She hadn't said anything re the pick up etc so after a nightmare night with ds1 barking like a seal and ds2 (baby) with a high temp I rang her asking her if am I right in assuming that her dp is picking up her dd but she said she wanted me to carry on a usual so her dp can get on with the painting. I said I was sorry but I was exhausted had a bad night, kids ill, don't want to pass anything on etc. I said that I don't mind doing it when they are both at work but really feel too tired to do it this evening when I knew her dp was at home. She was ok about it but a bit sulky (I've known her for 20 years so can tell) now i'm feeling guilty like i've let her down. It has also got harder lately anyay as now ds1 is 3 he misses his sister during the day and when both girls are here he gets left out cue sreaming which I could do without today. I am being unreasonable not collecting her and having her today?