Not sure if this is the right place to put this 
DS2 currently goes to preschool Tues/Thurs/Fri. He has Monday at home with me and Wednesday with my mum. My mum also helps me with DS1 school drop off/pick up as I'm a single parent so it is easier for her not to also have to do the preschool run.
I work Tuesday-Friday so thought him having the Monday with me would be nice for him.
Problem is he is due to start school in September and as a 30th August birthday he will be probably the youngest in this class. Alongside this he is very quiet and struggles socially. His older brother is the complete opposite and so DS2 he relied on him a lot when they are with other children etc. He now seems to be gaining more confidence at preschool, they have been amazing with him and have really helped him build up those social skills.
Question is, do I put him into preschool for the Monday too, after half term, to help him build that stamina for school and so he can keep working on his social skills or keep him at home with me for that day? I suppose I feel guilty that I could be spending the day with him, silly I know.
DS1 increased from 3 days to 4 in the run up to starting school but he also had an extra year at home due to being a September baby
What would you do? Thanks! 