I find it interesting that youd even line up in a C152 with a jet still on the runway just starting his takeoff roll, unless he's a fair way down the runway doing an intersection departure.
And even more interesting that youd line up with another aircraft obviously so close on final. Did you not have a look before lining up ?
Just because ATC says so, doesnt mean you have to.
I learnt to fly in C152 and C172's at an airport sharing the runway with up to 767's and was always cautioned about taxiing anywhere near the rear end of a jet aircraft, let alone one on the runway.
Lanceair