It's much easier to find a bike you can live with than it is a woman, so the sacrifice is probably a good one... as long as she isn't forbidding motorcycles in the future.
Why can't you keep the bike and woman, especially a bike like a B4 that's not a high ticket item and is (I assume) paid for. Back in the dark ages, I managed to keep my bike when I first got married - and I was an unemployed student marrying a gal w/kids.