That's probably worrying a little too much.
The eggs should be fine. Those eggs are tougher than you might think. The other girls might be curious about it, but they're probably not going to break it. Chickens are more likely to lay in boxes where they see other eggs. They crawl in there, dig out the straw, kick the other eggs all over the place, but the eggs survive just fine.
The first egg could come any time of day. They'll usually start trying to lay it in the morning, but they might get in and out of the box for hours before they settle down and actually lay the egg. I've gotten a pullet's first egg anywhere between 7:30 am and 3:00 pm. After the first egg, they usually lay about an hour later each day until the laying time reaches late afternoon, then the time rotates back to early morning. Newly laying pullets can take a while to get into a schedule though. Mine are laying kind of sporatically. I even have pullets laying eggs after dark. I think they're confused.