Personally, I had a strong feeling that Inter did not really want to keep Lukaku and took advantage of the first occasion that came along, such as Lukaku's personal contacts with Juventus, not to make this deal. Lukaku's playing reputation is ambiguous now, and therefore I even wonder why Juventus suddenly decided to join the fight for the player.
No, Inter is still want to keep Lukaku, but they just want don't want to spend huge money to sign him. It's all depend on Lukaku decision whether he want to join Inter or Juventus, Juventus have offer better monthly salary and higher bid for Chelsea. I think the reason is Juventus don't have any other good striker except Vlahovic, so Lukaku can be a substitute player. There's a rumor where Vlahovic will join PSG or Arsenal, so that's why they're looking for a new striker.
Chelsea loaned Lukaku to Inter last season. He performed well in matches but failed to replicate his peak form. Lukaku is outside the plans of new coach Mauricio Pochettino, and Lukaku will likely leave Stamford Bridge at this time. Inter is Lukaku's most potential destination. However, Inter balked when Chelsea demanded too much money. Therefore, striker Lukaku is said to have secretly negotiated with Juventus. And currently, there still needs confirmation to buy Lukaku from Inter and Juventus. Or maybe Inter has targeted other players, and Juventus must wait for a decision when Vlahovic joins PSG or continues to devote to them.