Alex Loudon's family think Pippa Middleton parties "too much".
The former cricketer's parents are said to be concerned about the couple's relationship because they are less than impressed with the 28-year-old brunette - the younger sister of Duchess Catherine - and her fondness for going out.
A source told Now magazine: "They don't think Pippa's right for him as she parties too much."
Pippa and Alex rekindled their relationship earlier this month after splitting up eight months ago when the 32-year-old lawyer reportedly struggled to deal with her newfound fame following Catherine's marriage to Prince William last April.
Pippa - who was maid of honour at her sister and William's nuptials - is thought to have spent the night at Alex's house late last month.
A source previously said: "She has been miserable without him and has been putting on a brave face since they split. It was never her call to end it.
"She's had a tough time lately and it's great to see she's back spending time with someone she trusts implicitly and with whom she has such a close bond.
"Many thought they were made for each other and he was the love of her life."