I would check them later as well. AN kids tend to be quite weakly for the first couple of days, so make sure they are warm enough, and getting milk. You might need to think about a heat lamp for them. A cardboard or wooden box on its side is sometimes good as it gives the kids someplace warm and cosy to sleep, with less draughts- but tomorrow would be time enough for that. I would give mum a warm drink this evening, if you add treacle (or molasses if you have any) and salt to warm water, it replaces her electrolytes. I'd also give something to eat- not a protein mix, but something like alfalfa, soaked beet pulp, some vegetables etc.
Beth