Me and my two daughters under 10 are staying at my sister house for two weeks, she just had a new born baby.we live in the Uk and sister live in the USA. I brought clothes worth over £500 for her new born and 4 year old and lots of snacks for all the kids that should last well over our stay. Now I want give her some food money how much should I give her for our stay. Note she might’ve not accept the money ( but will still insist until she accept) as in our family this is ok to stay at each other without contributing to food but feel bad.