I Have This Very Same Issue. The Saying Goes That Pregnancy Sex Is Supposed To Be The Best Sex Which Would Explain Why Your Partner Gets Off Super Easily Now. My Bf Was The Same Way & It Bothered Me So I Told Him About It. Now He Tries To Hold Off Until I Get Mines First. When That Doesn't Work I Whip Out My Toy, Hit Play On A Flick& I'm Just As Satisfied In No Time. Goodluck Hun.
Maybe when the baby starts day care or school.