Update Two Tables With One Form

I have two tables. The tables are relationally linked via FK. However, when updating table A’s columns there is only one column in table B that needs to be updated at the same time.

Is it possible to Update all of the columns in table A and only the one in table B using two Action Steps?
If so, would I use one Update Action Step for all the columns in table A and then only list one Update Action Step for the single column in table B?

If not, or if there’s a better way, please give me a hand to see how to do this… Thanks!