I couldn't usually go out to places that had lots of kids in them, so I spent time with my son in places that were less busy.
My son was frightful of places with lots of people and kids, so we usually just spent time in quiet places like parks.
I couldn't usually「普通はできなかった」 go out to places「場所に行く」 that had lots of kids in them,「子供がたくさんいる」 so I spent time with my son「その理由で息子と二人で時間を過ごした」 in places that were less busy.「そんなににぎやかじゃないところに」
My son「息子は」 was frightful「恐がった」 of places with lots of people and kids,「大人や子供がたくさんいる場所」 so we usually just spent time「なので普通は二人で時間を過ごした」 in quiet places like parks.「公園のような静かな場所」