This is taking on a definite supernatural theme. So how are Oscar and Gertrude linked?
[They're not linked...yet]
Gertrude meanwhile was having a bad time of it, two correct predictions of the lottery numbers, but no tickets. The problem was she wasn't convinced the predictions would still work if she actually acted on them, and she didn't have anyone else to try it instead. When you have an ability to predict future events, even if it was "patchy" to say the least, relationships were not destined for any length of duration. Two former boyfriends had been dumped because they were going to be unfaithful, even though they didn't know it at the time, and one because Gertrude didn't fancy waiting the two years he would spend behind bars, in about six months time. So she hedged her bets, she predicted the lottery numbers again, but when she bought the ticket she deliberately got the last number of six wrong, now all she had to do was wait.