Maybe they were at the ATM and some sketchy people were hanging around. Big Brother felt worried about Little Sister's safety while they were waiting in line or during the transaction. And on top of that, the ATM itself had issues like not printing a receipt properly.
Well, to figure out if it's your mother or sister in the manhwa raw, you need to pay attention to the details like their appearance, personality, and interactions with other characters. It might take some time to get a clear answer.
I think 'a knowing sister manhwa hentai' could imply a manga that involves a sister character in a somewhat risque or adult-themed situation. But without more information, it's hard to say for sure.
Downloading novels was indeed a very troublesome thing, especially when there were a lot of novels and there was no free novel downloading device. However, this was also a good opportunity to understand the plot and characters of the novel more deeply and try to create his own novel. In the process of creation, he could also better exercise his creativity and imagination.
Writing a novel was indeed a tedious task that required a lot of time and energy to conceive the plot, shape the characters, construct the worldview, and constantly modify and perfect it.
However, writing was also a very interesting and creative activity. Through writing, one could express their thoughts and emotions and create a unique story world. If he persisted in writing, he would discover his own strengths and potential in the process and improve his literary level.
If you feel that writing novels is troublesome, you might as well try some new writing skills and methods, such as reading more books, watching more movies, writing more, etc. These skills and methods can help you better understand writing and improve your writing efficiency and quality.