There's a new boy who's started at my DS's school. The new boy's mum would like to arrange a playdate, as she said that her son likes to play with my son the most. When I asked my DS about this new boy, whom he'd never mentioned playing with before, he said that he wasn't keen on playing with him as he's 'fighty' and hits him! I don't want to be rude and refuse a playdate, but I also don't want my DS being hit. Any idea about how to deal with this situation?