Time Tracking Concerns

I have some issues on Time Tracking.

Basically, sometimes, there are two people who are working on one line item. So, under people column I will be assigning two names. But then in time tracking, I am not sure if it can register or track the time of two people at the same time in real time. Because from my end, I can see that my colleague started already the timer. But I also wanted to log my time with her in the same time using the same timer. If I will click on that timer to log mine, that means i am stopping her timer. Am I right?

Any possible solution on this one? Screen Shot 2021-02-25 at 6.13.02 PM

Thank you!Screen Shot 2021-02-25 at 6.17.06 PM