Might be too late but I'd say no. It's basically about a marriage breakdown where the wife has an affair for years with husbands best friend. Looks at relationships between men and women and told backwards so starts 2 years after affair ends and ends when it starts. Great play but probably not one for a 14 year old (may well find it boring!)
I wouldn't - not because I think it would be particularly shocking but I just don't think the subject matter would be of any interest or hold his attention and, at 14, I don't think he could empathise with any of the themes of the play.