Yes. I, too, like to think that Mary really did love James and that she wanted children. How much acting did she do after marrying JMB? Little or none, evidently choosing to be a full-time housewife, home-maker and husband-supporter in preference to continuing her career as an actress.
After six years of child-free marriage - unconsummated, it has been generally accepted - Mary took a lease on Black Lake Cottage, a second home for the couple for nine years, and her only home during her marriage to Gilbert Cannan. But this was also a place to where both Mary and James would increasingly repair separately for short periods. Readers of certain biographies, and especially of Mary Ansell's 'The Happy Garden' and my own little book, will know that Mary occupied much of her time by transforming the cottage, both structurally and decoratively, and by developing and enlarging its substantial garden. James was not always present but even when he was he often shut himself away to work while Mary busied herself in the garden, despite having a full-time gardener. The new plants and trees, and especially her delphiniums, were clearly her child substitutes. And in addition to the well-known pet dogs, first Porthos and then Luath, who accompanied the Barries wherever they went in the UK, she had her own pets at the cottage: two white rabbits and a black cat (names unknown), and two tortoises: first Hookie, who met his unfortunate end at the paws of Luath, and then Everard.
So you could say that Mary had a family of sorts.