Hooking up two guitar combo amps?

I recently switch to bass and got a vintage Kustom 150w bass combo which works well. I used to play guitar and only have a Fender 25r only 25w, which I like the tone. I'm not really wanting to buy a new guitar amp and the bass amp tone is okay with guitar, but I prefer the 25r, just not loud enough to gig. I... show more I recently switch to bass and got a vintage Kustom 150w bass combo which works well. I used to play guitar and only have a Fender 25r only 25w, which I like the tone. I'm not really wanting to buy a new guitar amp and the bass amp tone is okay with guitar, but I prefer the 25r, just not loud enough to gig. I hooked up the Fender with the Kustom via the Fenders headphone output. I didn't play loud or very long, but it sounded okay. Is there any risk of damage on either amps? and should I just bite the bullet and get a new guitar amp?
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