I'm raising 2 kids abroad while managing my 80-year-old mom's care back home. I can't be in both places. Nicola Prentis is raising her two kids abroad and trying to look after her mother back home. Provided by Nicola Prentis When my cellphone rings as I'm wrangling my boisterous 8- and 11-year-olds into bed in Spain, I answer immediately. I know I'm adding another hour to the bedtime routine. It's my mother in the UK, calling for the third time that day. I don't know whether it's an actual emergency or the kind where she can't remember how the TV channels work. When I moved away from home at 24, my mother was in my hometown raising my teenage brother. It never occurred to me that if I ever had children, my mother would get old enough to need taking care of at the same time. I never thought it would be me Back then, like most 24-year-olds, I couldn't have told you what I'd be doing in a year's time, let alone decades.…