Lamby

You should check out ashitaba-San chi no muko kurashi it's about a newly wed couple who live with the brides family and the couple are trying to make babies but always get intertidal by her mom and two sisters also her mom has a kind of innocent crush on her daughters husband because it reminds her young days xD https://static.comicvine.com/uploads/scale_large/6/67663/5859533-03.jpg

I've been kinda just looking at my feed and decided to look around for that manga you were looking for...for research purposes of course, and yeah. It doesn't look like it even has any group scanlating it, I don't think there's even any raw scans online aside from just free previews on various Japanese manga sites like yondemill, I read chapter 1 and 2. It's a pretty fun concept, I can see it having an entertaining anime adaption of it ever gets one.

https://yondemill.jp/contents/16678 Use google translate app to read. Manga is called: くんくんガール

I can't find anywhere apart on j list and j box I went on to every manga site I could think of I don't think its been translated yet ;w;