Selly telly presenters use every trick in the book, both to "close" the sale, and to build a rapport with the potential customer.
Sharing personal details in order to do either is tricky and can backfire. QVC presenters have increasingly been oversharing their lives, listening only to their chosen echo-chamber, rather than the thousands (it can't just be us!) who are turned off by such tactics. So one lot of customers will be drawn in by this and think of the presenters as friends; and the other lot think this is a shabby tactic.
This sort of thing used to be remarked on more with IW presenters (IW watchers may have heard about Ellis (now on the jewellery channel I think) and pee-gate, and most distateful of all Denniece and her disabled daughter). I think the presenters on QVC who have served time on other channels may well have really caught the bug there... but if QVC seriously want us to think of them as "a cut above" or the Harrods of selly telly, they need to stop such questionable tactics in my view.
Their family members haven't signed up to sell merchandise on QVC, and probably haven't signed up to be all over the presenters' social media either. If they haven't, then they should use a little human courtesy and consideration and ask the family members if they mind. When it comes to young children and babies, who cannot consent, just.... don't.