Female led relationships discussion

My wife has started getting into pegging me and she’s done it two times in just a week. We usually use a tiny cylindrical dildo, but she wants something that feels more real—specifically a cock-shaped one that we own, though ours is bigger. Could anyone give some tips on how I can handle a larger size? Even with plenty of lube and staying relaxed, the small one still gives me pain. If I practice with it regularly by myself, will my body get used to sizing up?