I know this is a humor site, but in all seriousness: look at this as a golden opportunity, not a burden. If you welcome the new receptionists and treat them as equals, the three of you can work out systems and process that you all agree on, not just stick with what you inherited. I can tell you from many years of experience managing small teams of software developers, that most people find it a lot easier to deal with the annoying parts of their job if they themselves helped create the processes that lead to the annoying parts; instead of feeling like it's the result of some idiot's poor planning or poor execution, it feels like an unpleasant but necessary part of the job. And three people talking through everything that needs to be done are likely to come up with at least some improvements in the way the job is done. Seriously, I used the need to develop a bunch of new processes as a selling point to recruit people to my current team, and by every conceivable measure, everyone on the team is happy and doing well. Seize the opportunity!

Talk about a baptism by fire. This could turn out really well for you, but only if you have the support you need in order to make this all work. I hope for your sake you do.

Grab your power by the balls and squeeze until your underlings cry. Read Machiavelli. It's better to be feared than loved.