This author seems to have an affinity for pairing Mina and Sanae. Between the offscreen kiss in chapter 1 and this chapter basically being an excuse to show the two as a "perfect match" in a "flawless happy family". I'm just saying it seems like the author has a preferred ship. Wonder how the author felt when the sequel manga revealed Mina married a guy and had three kids with him while Sanae is still single.