その態度があなたの母戻ってくるまでだけ耐えられていくよ この表現は自然ですか？

@adamsouliparis 　Well, のも。。。I regret I used it in my sentence...
の in this case means something like こと, the thing. Like,
学校へ行くのは楽しい　＝　学校へ行くことは楽しい。（The thing that I go to school is fun.)
And も here expresses something among various things that are happening in the situation.
EX. 散歩に行くのもいいな。means almost the same as 散歩に行く事はいいな、which means 'going for a walk would be fine.' But if you say 散歩に行くのは、the focus is put on 'going for a walk', whereas when you say 散歩に行くのもいいな、'going for a walk' is not particularly emphasized, but is said just as one of the ideas.
So, 我慢するのも、今だけだ is not emphasizing 我慢する、but the person actually wants to say 'everything that is happening here would end when your mom comes home'
Oh, well, I think my explanation is sounding just incoherent. I hope you will encounter this expression sometime in your Japanese class, and hope you will be with an excellent teacher at that time! Good Luck for you! (´∀｀;;