This, very much.
There's quite a big difference between someone asking a relative or friend if they'd like to come & visit for a few days, and another between someone being asked if they can put somebody up for a few nights.
OP is putting herself out for the convenience of her cousin, and from the sound of it that isn't that infrequent a thing if she's been recently and is due back again shortly. Inviting guests to stay for a special event or as a holiday, and being used as a free B&B, have completely different dynamics.
For example I often don't eat breakfast in the mornings as eating early can make me sick, and if I do eat it will be just toast or maybe a small bowl of porridge. If I had invited someone to stay for our mutual pleasure I would check what they normally ate for breakfast & make sure it was available and I may even cook it for them. But if (as has happened in the past) a friend who had moved away and asked to use my home as their base when going out visiting other friends & family every day, I'd try to ensure there was plenty of what they wanted around but I wouldn't be cooking them a full English - they can do that themselves if they want it.
Equally I'd ask in advance if there was anything they didn't like or couldn't eat & not offer that for a meal, but otherwise I'd tell them what I was planning & ask would they like to join me. I would make sure that they knew exactly what was available & where to find it, where any required cooking utensils etc were and so on. If they were staying as an invited guest I would plan meals around them, if they invited themselves then I wouldn't.
In the same vein, if I'd asked someone to stay for our mutual pleasure I'd book time off work & plan going out etc, but there's no way would I be making them cooked breakfast & planning time around them if they were just there as a convenience for them.