You have two separate issues here: Going to Mass when you cannot receive Communion, and going to Mass when physical issues make it difficult to do so.
Presumably, your wife is Catholic; that means the Sunday/holy day obligations apply, whether or not she can receive Communion, and “virtual attendance” is not sufficient. Not being able to receive Communion is a cross, but it is not an excuse to miss Mass. There is a story told of
King Louis XIV of France, a notorious public sinner who kept mistresses, that he attended Mass to fulfill his religious obligation to do so and refrained from Communion out of respect for the Eucharist, even though doing so subjected him to public scrutiny. (He could teach a thing or two to modern Catholic politicians who present themselves for the Eucharist in spite of their public support for moral evils and despite pleas from their bishops that they not do so.) How much easier is it then for a Catholic who is not in the public eye to meet the religious obligation to attend Mass while refraining from presenting himself or herself for Communion?
As for the second issue, being impeded from attending Mass by a physical disability is a just reason to miss Mass. In such a case, watching Mass on TV or listening on the radio does not fulfill the obligation but does provide a way for those not able to attend for just reason to participate in some way. The question is whether or not advanced pregnancy is a valid reason for missing Mass. I suppose if your wife’s exhaustion was so bad that she was a danger to herself or others if she left the house, that would be a valid reason; but in that case she should be consulting with her doctor. Most women in the eighth month of pregnancy are still quite capable of attending church, especially if someone else (such as their husband) drives them. If the seating in your current parish is inadequate for your wife’s condition, then go to another parish where she will be more comfortable for the remainder of her pregnancy.
