Penny Lancaster has been keeping fans up to date with her summer holiday in America, and Wednesday's post showed her exciting date night with her husband Rod Stewart.MORE: Penny Lancaster is a vision in flirty mini dress for sun-drenched photoIn a photo shared with her 158,000 followers, the mother-of-two could be seen showcasing a colourful short-sleeved mini dress whilst cuddled up to Rod, who leaned his head on her shoulders whilst smiling at the camera.WATCH: Sir Rod Stewart shares hilarious video inside £4.6m homePenny looked gorgeous, as usual, with her long blonde locks styled in soft waves, whilst keeping her makeup natural.RELATED: Penny Lancaster looks stunning in slinky dress as she poses with topless Rod StewartREAD: Rod Stewart and Penny Lancaster celebrate amazing news – and look at Penny's dressThe couple, who recently celebrated their 16th wedding anniversary, were at The Peninsula New York, a five-star hotel located right next to the MoMa, and had two pink cocktails beside them. It was no doubt a night to remember, judging by Penny's caption.