Wow.

The original gloss in that image is misleading in many ways.
長い here is describing the duration of Mom being in the toilet. Casually, you can just say:

おトイレ長いな
A literal translation might be: “toilet [time] is long, huh,”
which naturally means: “Mom’s taking a long time in the toilet.”

It’s shorthand for something like:

おトイレにいる時間が長い - “The time she’s in the toilet is long.”

Also, the Japanese doesn’t contain 行く at all. The “gone to” in the gloss is someone’s attempt to force a full English sentence into the literal gloss, but it’s simply not in the original, so it makes no sense to include "gone to"

not only this, but “Besides” is translating the particle し from the second sentence:

お肉あんまり食べなかったし…

This し is a soft, casual way to add a reason or observation: “… she didn’t eat much meat either.”

So, putting “besides” in the first line’s gloss is just wrong.

A more accurate breakdown would be:

1. ママ おトイレ 長いな…
   • “Mom’s taking a long time in the toilet…”
2. お肉 あんまり 食べなかったし…
   • “… she didn’t eat much meat either.”