Here's some details from the LN.
Allen is, basically, a big fan of magic stones. As you can see on how almost everything about Summoner require magic stones. That "everything" included Leaf of Lives, aka his recovery items. Sure, he's got a shit ton of magic tons right now, and could probably...
Buying cakes for your wife isn't the only way to return her kindness. For example, you could spoil her. Not that I'm expecting you to do it, so...
Simply help her wtf??? She's doing all the housework now, you should simply help her with some. Maybe you do the sweeping the floor, maybe you try...
I bet the MC helped her selflessly in the past and he just doesn't remember because he's just that selfless and kind or something
wait that sounded familiar
That letter reminded me of episode 10 of Violet Evergarden. Both including parents, which explains a lot why I teared up here too. This is such a great read, I've found the series only yesterday and binged all 239 chapters in two days. I love the meme and the effort you translators put through...