@Safesaf I haven't read this one yet but another manga with an adult female and a young male I've read is Shingeki no Eroko-san
Edit: just skimmed through this chapter... How's the daughter a high school sophomore at the age of 15? Elementary school in Japan has 6 grades, middle school has 3 grades and high school has 3 grades. Kids enroll into elementary school at the age of 6, so her daughter should be either in her last year of middle school or in her first year of high school.
When you play the "none of that matters, anyone would be happy going out with you" opening move and then get countered with the "You're the one I've loved all along!" reversal.
Congratulations, you played yourself.