She's gorgeous, so adorable! I'm glad you are not ignoring her for 20 minutes when you return home because that would be totally unnatural and this weird behaviour could confuse your pup and make her feel something is wrong. Instead just keep it low key and calmly take her out to pee as soon as possible.Thank you all for the responses.
@LeoRose I've read a lot of stuff about how to deal with excited pee-ers, what you have suggested is how I handle it. Some say ignore her for 20 minutes when you get home but that's not why I have a dog - I love that she wants to greet us when we get home and I look forward to seeing her too - a little pee isn't a big deal and I'm sure she will grow out of it.
She is doing great to be honest, she has even mostly mastered loose leash walking
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Sidenote: I've never heard of a pup pretending to pee! I never used treats for potty training either, but those are some sneaky pups lol!