Buses here in Japan stops when in idle mode (eg while waiting for the traffic light). And when the engines are off, it can be eerily silent. Yui almost always chooses this particular moment to loudly say in a sweet voice, “Mommy daisuki (I love Mommy)”. It’s one of those moments when you feel several emotions all at once – joy, pride, elation mixed with embarrassment (because of public declaration and because the silence was broken and might have disturbed somebody) and worry (how to teach Yui when to choose the best time to say her affections without discouraging her from expressing her feelings). 
Thank you Anak. You’re giving Mom and Dad immeasurable joy. 🙂