DPs niece visited on Friday - he gave her £10 and said 'that's to spend on your holidays'. Niece took the money,put it into her bag and said 'I've got £40 to take now'. No thanks at all - DP nor her parents didn't prompt her (not that I think she should need prompting at 10!!) so I asked her to thank DP (only on a non aggressive 'ooh, did you forget some little words there DN?' way)
She did grudgingly say 'thanks' but her parents didn't seem impressed that I'd pushed it - aibu to have prompted her?