Yeah I don't think it's a pregnancy, it'd be weird for them to announce it in a joint way. It'll be some "work" thing.I thought this for Anna. But in December she wrote a blog post saying that she wasnt at all ready for children and if she announced a pregnancy any time soon then basically something major would need to have changed. Also Anna's been exercising as normal so I doubt its that.
And if it was Lily, then wouldn't she have referred to it endlessly, rather than going mysteriously AWOL for 24 hours after dropping a racist clanger?