I did it twice in 4 weeks a couple of years ago and went again 3 months later.
I had no problem whatsoever.
I was asked why i was back so soon, explained the second trip was a treat for my parents and was let it without further problem.
I'd just tell them the truth.
With all the adverts on the tv in england at the moment encouraging tourists to visit , you'd hope they'd be delighted to see you