AITA for being mad at my FIL for possibly getting my son sick?

So I live with my FIL(not by choice, but financially things have been tough.) my fiancé and my 2 month old son. On Christmas, he found out that his gf(who does not live with us.) and her son got Covid. He refused to go to Christmas breakfast because he didn’t want to possibly get his one grandchild sick. The other day he told me he went to his gfs house. I told him, I didn’t appreciate him not telling me beforehand due to the fact that he was in such close proximity to my son. He told me that it was okay, since he wore and mask and didn’t go close to her. Fast forward to now and he has a cough and is really congested. Now that he’s sick I’m not getting any help from anyone in the house without it being an argument and my FIL told me “well..if you didn’t want him getting sick, you should have just kept him in a bubble.” AITA?

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