Lauren takes up hiking with Mike but finds herself more than a little worn out by her new active lifestyle. For more clips from Millie Inbetween visit .\rbr\rbrIts Millies 13th birthday and her dad organises the most embarrassing party! For more clips from Millie Inbetween visit .\rbr\rbrWatch clips from new drama Millie Inbetween - new episodes every Wednesday or catch up on CBBC iPlayer.\rbr\rbrA simple question turns into a big argument between Mum and Mike! Watch more Millie Inbetween clips on the CBBC website at .