my wife left, but still lives with me #2/continued

[tough spot]

So every Friday we go to eat at the same restaurant with my MIL. MIL pays, else we wouldn't be able to afford that. This week I said to my wife 'no, i won't be going because i think you would have less stress and enjoy it more without me'. I said that in a calm even tone.

I haven't enjoyed going so much these last few weeks because I feel like the 5th wheel and my wife has been uneasy in my presence lately. What do you guys think......is that detaching, am i blowing an opportunity to have something to share with my wife, is that giving her some needed space?

looking for some opinions.

thanks