Unidentified intruder! Help please

Hi I'm a novice gardener, but have pot plants in my home. In one such pot containing a money plant we noticed a straggly vine type plant/weed growing (see photo). We're confused because we dont have anything like it elsewhere, and whilst it has had a pretty small white flower, and some more buds appearing at the top, and a bright green leaf, I'm having a bit of a wobble incase it's something poisonous. I'll append a photo, which is not terribly clear, but if anyone can identify it and offer any advice about cleaning up the area where it was I'd be very grateful, thankyou, Marion

 

Looks a bit like nightshade

 

One of the Solanaceae family. Could a chilli or pepper seed have got in there somehow?